Posted By Stephen M. Walt

I've made this point before -- here and here -- and I suspect I'll have to make it again. But whatever you think of the outcome of yesterday's Super Bowl, the unexpected second half power outage was a small blow against U.S. power and influence.

Why? Because one of the reasons states are willing to follow the U.S. lead is their belief that we are competent: that we know what we are doing, have good judgment, and aren't going to screw up. When the power goes out in such a visible and embarrassing fashion, and in a country that still regards itself as technologically sophisticated, the rest of the world is entitled to nod and say: "Hmmm ... maybe those Americans aren't so skillful after all."

Or maybe we've just spent too much money building airbases in far-flung corners of the world, and not enough on infrastructure -- like power grids -- here at home.

P.S. The other lesson of the Super Bowl is that strategy matters. As in: the abysmal play-calling by the 49ers when they had first-and-goal inside the ten yard line, trailing by less than a touchdown. Four dumb plays, and the Ravens were champs. Sigh.

Mike Ehrmann/Getty Images

Posted By Stephen M. Walt

Today is Hillary Rodham Clinton's last day as Secretary of State. She's been receiving mostly accolades for her service, including considerable praise from President Obama in a recent joint televised interview. But with the exception of the mean-spirited and highly partisan grilling she got from a congressional committee over Benghazi, most of the interviews I've seen have been pretty gentle affairs. I've sufficient respect for Secretary Clinton's talents and intellect that I'd like to see her take a swing at a few fastballs.

In that spirit, here are my Top Ten Tough Questions for Secretary Clinton:

Madame Secretary:

#1. You have said that your "biggest regret" during your four years of service was the loss of four American lives during the Benghazi attack. It was a painful event, to be sure, and your regret is understandable, but aren't there many other events and decisions whose negative consequences were much greater? Shouldn't we be focusing more on the loss of American, NATO, and local lives in Afghanistan and Pakistan, or our inability to bring other conflicts to an end, and not on this one unhappy occurrence?

#2. You have been widely praised for your tireless travels, logging more miles than any Secretary of State in our nation's history. It's easy to understand why getting out of Washington, DC is so tempting, but is all that travel really necessary or desirable in an era when modern communications would allow you to speak face-to-face to virtually any world leader anytime you want? Videolinks would even permit you to give speeches and answer questions anywhere in the world, but without having to go there in person. Looking back, do you think you might have had more influence had you stayed home a bit more?

#3. You have been justly praised for being a great team player in this administration, something that many people did not anticipate when you were nominated. At the same time, the Obama White House and NSC has held the reins on a lot of key foreign policy issues. What foreign policy problems do you wish you had been given greater authority to handle on your own?

#4. As Secretary, one of your major initiatives was the Quadrennial Diplomacy and Development Review, eventually released in 2010. It created a bit of buzz when it was released, but it seems to have largely disappeared from the scene. What concrete and tangible impact has this report had on the conduct of American diplomacy or on specific policy initiatives in key areas?

#5. At the beginning of his first term, President Obama appointed "special envoys" to handle thorny foreign policy areas like Afghanistan/Pakistan, the Israel-Palestinian conflict, and North Korea. One of these envoys was the late Richard Holbrooke, a close personal friend of yours. For various reasons, none of these special envoys seem to have accomplished very much. What lessons should we draw from this failed experiment? And did having all these independent operators diminish your authority and ability to craft an overall foreign policy strategy?

#6. U.S. military forces are now organized in various regional combatant commands, each under a designated regional "commander-in-chief" or CINC. These regional CINCs have a vast array of military, intelligence, and other assets at their disposal, and the resources they can bring to bear far exceed those of the State Department. For this reason, foreign governments often pay as much or more attention to the CINCs as they do to the U.S. ambassador, for the simple reason that the CinCs can do more for or against them. Here's my question: if you were an ambitious young person who wanted to make a mark on U.S. foreign policy, why go to a nice four-year college and then join the Foreign Service? Wouldn't it make more sense to go to West Point, Annapolis, or Colorado Springs and try to become a senior military leader instead?

#7. One of your signature issues has been the advancement and empowerment of women, and your efforts on this issue have won you enormous praise both here in the United States and in many other countries. Given your strong convictions on this issue, are you sorry that you are being succeeded by a wealthy white male, that the Pentagon will also be led by another white male, and that there are hardly any women in top foreign policy jobs in Obama's second-term team? Did you ever raise this issue with the President, and if so, what did he say?

#8. You have made it clear that you strongly support former Senator Chuck Hagel's nomination as Secretary of Defense. What did you think of the Senate Armed Services' Committee grilling of him yesterday? Was it appropriate for them to talk incessantly about Israel, and to ignore most of the key problems that he will face as SecDef? Why do you think the Senators -- including your successor, Kirsten Gillibrand -- acted in this way, and what do you think foreign governments thought as they watched the circus?

#9. What is one aspect of world politics and America's global role that you believe most Americans do not understand? If you could magically change one thing that most Americans believe about the rest of the world and its relationship with us, what would it be?

#10. What do you regard as your single greatest achievement as Secretary of State? And if you could have one "do-over" -- apart from Benghazi -- what would it be?

Secretary Clinton is a seasoned pol by this point, and I'm sure she'd find a way to dodge some of those queries. But what if we put her on truth serum first...?

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Posted By Stephen M. Walt

In The Israel Lobby and U.S. Foreign Policy (2007) John Mearsheimer and I wrote:

The bottom line is that AIPAC, which bills itself as ‘America's Pro-Israel lobby' has an almost unchallenged hold on Congress ... Open debate about U.S. policy toward Israel does not occur there, even though that policy has important consequences for the entire world. (p. 162)

After discussing the lobby's efforts to influence the executive branch, we noted:

There is an even more obvious way to shape an administration's policy: the lobby's goals are served when individuals who share its perspective occupy important positions in the executive branch. . . .[G]roups in the lobby also try to make sure that people who are seen as critical of Israel do not get important foreign policy jobs. (pp. 165-66)

And after a lengthy discussion of the lobby's efforts to police public discourse and smear those who disagree with them with the charge of anti-semitism, we concluded:

The various strategies that groups in the lobby employ ... are mutually reinforcing.  If politicians know that it is risky to question Israeli policy or the United States' unyielding support for Israel, then it will be harder for the mainstream media to locate authoritative voices that are willing to disagree with the lobby's views.  If public discourse about Israel can be shaped so that most American have generally positive impressions of the Jewish state, then politicians will have even more reason to follow the lobby's lead.  Playing the anti-Semitism card stifles discussion even more and allows myths about Israel to survive unchallenged.  Although other interest groups employ similar strategies in varying form. most of them can only dream of having the political muscle that pro-Israel organizations have amassed. (p. 196)

I want to thank the Emergency Committee for Israel, Sheldon Adelson, and the Senate Armed Service Committee for providing such a compelling vindication of our views.  As Rosie Gray amd Andrew Kaczynski of Buzzfeed noted, at yesterday's hearing on Chuck Hagel Israel was mentioned 166 times, and Iran (a problem closely linked to Israel) 144 times. Afghanistan was mentioned only 20 times, and the problem of suicides of U.S. troops only twice. Glad to see that those Senators have their priorities straight. No wonder Mark Twain referred to Congress as "the smallest minds and the selfishest souls and the cowardliest hearts that God makes."

I am sometimes asked if I have any regrets about publishing our book. As of today, my only regret is that it isn't being published now. After the humiliations that Obama has endured at the hands of the lobby and now the Hagel circus, we'd sell even more copies and we wouldn't face nearly as much ill-informed criticism.

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Posted By Stephen M. Walt

The flap over Chuck Hagel's nomination to be the next secretary of defense -- brought to you, like so many other foolish things, by hardliners in the Israel lobby -- has been a distraction from the real questions that the next secretary of defense ought to be ready to address. I happen to think Hagel is a good choice for the position, but he shouldn't get a free ride when he testifies tomorrow. In that spirit, here are the Ten Questions I'd Ask Chuck Hagel on Thursday.

Senator Hagel:

1. On China: "Do you think China's rising power poses a serious threat to U.S. interests? If its power continues to rise, should the United States continue to strengthen its Asian alliances and move more military forces to Asia? What other steps should the United States take now to protect its geopolitical interests in Asia, and how can we avoid a new Cold War there?"

2. On Taiwan: "As China's naval, air, and missile capabilities increase, defending Taiwan will become increasingly difficult. If at some point defending Taiwan is no longer militarily feasible, what should the United States do?"

3. On cyberwar: "Are you worried that America's use of cyberwarfare capabilities -- such as the famous STUXNET attack on Iran -- is setting a dangerous precedent for others? Given our growing dependence on computer networks, shouldn't we be actively pursuing some sort of a global regime to limit this danger, instead of assuming we will always be better at it than others?

Bonus follow-up on drones: "Same question: are we setting an equally dangerous precedent here? And do you agree with critics who say that current drone strikes are often counterproductive because they create as many extremists as they take out?"

#4. On nuclear weapons: "If it were solely up to you, sir, how many nuclear weapons would you maintain in the U.S. stockpile, even if other states did not reduce their arsenals at all?"

#5: On U.S.-Japanese relations: "The U.S.-Japanese security treaty is decidedly one-sided. As MIT professor Barry Posen points out, the treaty commits us to defending Japan while Japan promises to help. Shouldn't this arrangement be reversed? Why should America be more committed to defending Japan than the Japanese are? As secretary of defense, what will you do to produce a more equitable sharing of burdens between the U.S. and its wealthiest allies?"

#6: On torture:  "Are you comfortable with how the Obama administration dealt with the previous use of torture by U.S. personnel? Do you think the officials who authorized torture and other war crimes should have been prosecuted?"

 

#7: On Iraq and Afghanistan: "In the past decade, the United States has failed to achieve its strategic objectives in two major conflicts: Iraq and Afghanistan. Apart from the obvious lesson that we should not start foolish wars, what other lessons should the U.S. military be learning from these twin failures?"

#8: On the global military footprint: "The United States has hundreds of bases and other military facilities in every continent of the world; no other country comes even close. In the absence of a serious peer competitor, does our security really depend on this enormous global footprint? Which facilities could we do without?"

Bonus follow-up: "Defense experts also agree that America's basing structure at home is inefficient. As Secretary, are there any bases you would close or consolidate?

#9: On rape in the U.S. armed forces: "President Obama has recently authorized the deployment of women in combat roles. Yet sexual harassment and rape have reached epidemic proportions within the U.S. military, with over 3000 incidents per year being reported. What do you intend to do about this?"

#10: On veterans' benefits: "The United States should pay its soldiers a fair wage and stand by its veterans. Yet a number of budget experts now believe that ever-escalating benefit packages threaten our ability to maintain an effective defense. Do you think our current approach to military compensation is about right, or does it need to be fundamentally rethought? If the latter, how?"

If anybody asks him a few questions like that, they might even forget about some of those other issues, and the Senators might learn something useful about his qualifications and judgment.

JUNKO KIMURA/AFP/Getty Images

Posted By Stephen M. Walt

Today's award for idiotic chutzpah goes to Sen. Ted Cruz of Texas, for complaining that Secretary of State-to be John Kerry and SecDef nominee Chuck Hagel are "less-than-ardent fans of the U.S. military." I kid you not.

The first and most obvious problem with Cruz's remark is that he directed it at two decorated war veterans. Like other GOP chicken hawks, Cruz never served in the military. Apparently his own "ardent" admiration for our armed services wasn't enough to lead him to enlist.

But the second and more important point is that being an "ardent fan" of the military isn't a good position for any public servant. Don't get me wrong: I respect my friends in the armed services and I'm grateful for their service. And I certainly don't think political leaders or pundits should be reflexively hostile to the military either.

But as the Founding Fathers realized from the start, a large, permanent military is at best a necessary evil. In a perfect world, we wouldn't have to spend any money at all defending ourselves, and the only reason we do is because the world in which we live is far from perfect. But there's nothing inherently wonderful about spending hundreds of billions each year on military forces, even if the weaponry they possess is dazzling and the skill of our troops is impressive. In other words, the fact that we have a large and powerful military isn't something to celebrate; it's just one of those unfortunate necessities in the dog-eat-dog world of international politics. A big military establishment also turns out to be pretty hard to control, and as Dwight Eisenhower famously warned, the "military-industrial complex" inevitably wields a lot of political power and not always in a good way

For this reason, public servants shouldn't be "ardent fans" of the military (or any other big public program). Instead, they should be intelligent skeptics: aware that such programs are needed but constantly holding them to account and looking for ways to make them more effective. Which is why Americans ought to be glad President Obama nominated Messrs. Kerry and Hagel, and why Senator Cruz's constituents ought to be more than a little embarrassed.

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Posted By Stephen M. Walt

Here's a little fantasy for you to ponder: what if one of our senior foreign policy officials accidentally swallowed some sodium pentothal (aka "truth serum") before some public hearing or press conference, and started speaking the truth about one of those issues where prevarication, political correctness, and obfuscation normally prevail? You know: what if they started saying in public all those things that they probably believe in private? What sorts of "inconvenient truths" might suddenly get revealed?

In that spirit, here's my Top Five Truths You Won't Hear Any U.S. Official Admit.

#1: "We're never gonna get rid of our nuclear weapons." U.S. presidents have talked about disarmament since the beginning of the nuclear age. According to the 1967 Non-Proliferation Treaty, we're formally committed to "to pursue negotiations in good faith on effective measures relating to cessation of the nuclear arms race at an early date and to nuclear disarmament, and on a treaty on general and complete disarmament under strict and effective international control." It has even become fashionable for retired foreign policy experts like George Shultz, William Perry, Sam Nunn, and Henry Kissinger to call for eliminating nuclear weapons too (even though they would have strenuously opposed such actions while in office) and of course Barack Obama made some speeches about it early in his presidency. And now some folks are trying to make a big deal about Chuck Hagel's involvement with Global Zero, a respectable international campaign to get rid of nuclear weapons.

But let's get serious for a minute. Although the United States has reduced its nuclear stockpile sharply since the end of the Cold War, it still has thousands either on active deployment or in reserve. Nobody in power is seriously advocating getting rid of all of them anytime soon, and even modest reductions (such as those stipulated by the most recent arms control treaty with Russia) are politically controversial. U.S. leaders have to pay lip service to the goal of total disarmament, and a few of them might privately favor it, but they understand that these weapons are the ultimate deterrent and that the United States isn't going to give them all up until it is confident that there is no conceivable scenario in which it might want them. Which means: not in my lifetime, or yours.

#2: "We don't actually care that much about human rights." Presidents, diplomats, and other politicians talk about human rights all the time, and both Congress and the Executive Branch often bully small countries over their human rights performance, especially when we have other differences with them). But when human rights concerns conflict with other interests, our ethical concerns take a back seat nearly every time. Most Americans didn't care  when the U.S.-led sanctions program against Iraq caused the deaths of several hundred thousand Iraqis (many of them children), and none of the senior officials who authorized torture during the Bush administration has faced indictment or even serious investigation (Just imagine how much we'd be howling if we suspected some foreign government had been waterboarding captive Americans!). The United States has plenty of allies whose human rights performance ranges from questionable to awful, and we continue to trade and invest in China despite its own lax human rights standards. I'm not suggesting that the U.S. government is totally indifferent to such concerns, of course; what I'm saying is that we are rarely willing to do very much or pay significant costs in order to advance human rights, unless our strategic interests run parallel. Like most countries, in short, we talk a better game on human rights than we actually deliver. But you're not going to hear many American politicians admit it.

#3: "There's not going to be a two-state solution." For official Washington insiders, the politically-correct answer to any question about the Israel-Palestine conflict is that we favor a two-state solution based on negotiations between the two parties, preferably done under U.S. auspices. Never mind that there's not much support for creating a viable Palestinian state in Israel (surveys in Israel sometimes show slim majorities in favor of a 2SS, but support drops sharply when you spell out the details of what a viable state would mean).   Never mind that the Palestinians are too weak and divided to negotiate properly, and the failure of the long Oslo process has diminished Fatah's legitimacy and strengthened the more hardline Hamas. Never mind that the latest Israeli election, while it weakened Netanyahu, did not strengthen the peace camp at all. And never mind that the United States has had twenty-plus years to pull of the deal and has blown it every time, mostly because it never acted like a genuine mediator. But nobody in official-dom is going to say this out loud, because they have no idea what U.S. policy would be once the 2SS was kaput.

#4: "We like being #1, and we're going to stay there just as long as we can." Most U.S. leaders like to talk about global partnerships and the need to work with allies, and they try not to speak too glowingly about American dominance. But make no mistake: U.S. leaders have long recognized that being stronger than everyone else was desirable, and nobody ever runs for president vowing to "make America #2." That's why U.S. leaders have always been ambivalent about European unity: they want Europe to be sufficiently unified so that it doesn't become a source of trouble, but they don't want it to cohere into a super-state that might be powerful enough to stand up to Washington.

The problem, of course, is that openly proclaiming global primacy irritates other governments and makes them look for ways to keep Washington in check. That's why the first Bush administration had to disavow an early draft of the 1992 Defense Guidance; it was way too explicit in laying out these familiar aims. But dropping that draft didn't alter the ambition, and despite what you might think, neither Clinton, Bush Jr., or Obama has abandoned the basic goal of keeping the United States #1. Whether their policies advanced that goal is another question.

#5: "We do a lot of stupid things in foreign policy. Get used to it." Everyone knows that U.S. policy toward Cuba has been a failure since the early 1960s -- that's half a century, folks -- but it never changes because the stakes don't seem worth it and it would tick off a handful of influential people in Florida. Everyone knows the foreign policy side of the "war on drugs" has been no more successful than the anti-drug campaign here at home, but you didn't hear Kerry say that during his hearings last week and you won't hear Hagel (or anyone else) say that either. Everyone knows that most U.S. allies around the world have been free-riding for decades and taking advantage of our protection to pursue their own interests, but saying so out loud wouldn't be ... well, diplomatic. More and more insiders know that the Afghan war is a loser, but we're going to pretend it's a victory because that makes it getting out politically feasible. It's obvious that our basic approach to Iran's nuclear program has been misguided, and that we've spent the last two decades giving Iran more reasons to want a nuclear deterrent and digging ourselves into an deeper diplomatic hole. But don't expect officials to acknowledge that simple fact, and certainly not in public.

Like I said, this is just an idle fantasy. I don't really want to see what Kerry or Hagel or McDonough or Lew or others would be like on truth serum (though I sometimes wonder if somebody is slipping a smidge to Biden every now and then). But it is kinda fun to imagine what they might blurt out in an idle moment, especially if the normal inhibitions and constraints were removed. What would you expect them to say?

Alex Wong/Getty Images

Posted By Stephen M. Walt

I attended a seminar yesterday on Mexico's illegal drug enterprises, which offered a pretty grim assessment of the challenge these organizations pose to Mexico and the United States. And then I read Hugh Roberts's op-ed in today's Financial Times, which argued that outside interference in the Sahel has mostly made things worse and will continue to do so in the future.

Which sparked the following question: why is the United States getting hot and bothered about the events in Mali (troubling though they are), while the problems caused by the violent drug organizations in Mexico fly mostly below the radar? As I learned at yesterday's seminar, the drug war in Mexico was never mentioned during the presidential debates, even though over 60,000 Mexicans have been murdered over the past six years and even though this violence has killed several hundred Americans in recent years too. Prominent senators like John McCain keep harping about violence in Syria and the need for greater U.S. involvement; why doesn't violence that is closer to home and that affects Americans more directly get equal or greater attention?   To say nothing of the effects that Mexican meth and other drugs have on the United States itself.

It's a serious question: why do some fairly distant and minor threats get lots of play in our discourse and command big-ticket policy responses, while more imminent threats get downplayed? Here are some possible reasons.

First, direct and deliberate threats to attack the U.S. or Americans abroad generate more attention than threats that might kill even more people inadvertently. Groups like al Qaeda deliberately target Americans (and others); by contrast, drug gangs mostly want to make money and the harm they do to others is a by-product of their criminal activities. You know: it's just business. An understandable, if not entirely rational, reason to see them as less threatening. 

A corollary reason is the fear of "Islamism" and the impact of the al Qaeda brand. We wouldn't be nearly as worried about "Al Qaeda in the Islamic Maghreb" if it had stuck to its original name ("the Salafist Group for Preaching and Combat"). No matter what your actual agenda is, putting on the al Qaeda label is a good way to guarantee you get a lot of attention from Uncle Sam.

Second, we are more likely to respond to threats when we think there is a simple, cheap, and obvious military response. This is partly because the U.S. military is well-funded, omnipresent, and good at blowing things up, which gives presidents more confidence that they might actually accomplish something they can brag about later. By contrast, we ignore or downplay problems when we know in advance that we don't know how to fix them. Trying to address the drug violence in Mexico in a serious way would require the United States to do more to reduce our society's appetite for drugs, or make the trade less lucrative by decriminalizing it (ok for pot, big problem for meth). And we can't just subcontract the response to the military, because our relationship with Mexico also involves lots of other agencies (State, Justice, INS, DHS, etc., etc.). If you're a politician and you don't have any answers, you won't bring up the issue yourself and you'll hope to God that nobody else does either.

Third, some threats get attention because somebody has done a good job of marketing on their behalf. I get several unsolicited emails a day from various Syrian rebel groups, each of them providing information designed to encourage greater U.S. participation. This is of course nothing new: the government of Kuwait hired a PR firm to make the case for U.S. action in the first Gulf War, and the British government waged an aggressive propaganda campaign to foster U.S. involvement in World War I. Threat assessment is never as apolitical as the Ideal Strategist would like; sometimes it comes down to which side has better threat-mongerers.

Fourth, we hyper-ventilate over Mali and downplay Mexico because the latter is close by and we have lot of positive relations there that could get disrupted if we went all-out after the drug lords. Sending drones and special forces into places like Yemen or Mali doesn't threaten a lot of other vital relations with those countries (e.g., US trade with Yemen in 2012 was only $500 million), but interfering in Mexico could jeopardize our $450 billion-plus trade relationship and cause other political problems, especially given the prior history of U.S. interference there.

All of which reminds us that there's a big error term in how great powers (and especially the United States) identify and prioritize threats. We'd like to think it was based on rational assessment of cost, benefits, risks, and opportunities, but that seems to be true only in the most crude sense. U.S. leaders did (eventually) recognize the geopolitical threats posed by Wilhelmine and Nazi Germany, Imperial Japan, or the Soviet Union, just as we now worry about what a rising China might portend for the future. But at the margin, our ability to prioritize lesser threats properly is pretty paltry. How else to explain why we get in a lather when North Korea tests a missile -- something we've done hundreds of times -- while downplaying more immediate problems much closer to home?

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Posted By Stephen M. Walt

There was a terrific NOVA program on the tube last night, on the subject of remotely-piloted vehicles (aka "drones") and their rapidly expanding role in the American military. The show focused mostly on the technical aspects of these weapons, but didn't omit some of the tricky ethical and political questions associated with their use. FP's Rosa Brooks argues that the advent of drones is a recipe for perpetual war; I'm inclined to agree, at least as long as the United States can continue to use them with impunity.

I took three lessons away from last night's program. First, a reminder: for all the alleged successes of our expanded drone program (i.e., degrading al Qaeda in various locales, providing battlefield intel in Afghanistan, etc.) in the end the United States failed to achieve its core objectives in either war. Iraq did not become a stable, pro-American democracy (it remains violent and if anything tilts toward Iran).  Nor did we defeat the Taliban and create a stable democracy in Afghanistan (whose fate will be determined after we leave in 2014). And this reminds us that technological wizardry does not always translate into strategic success.

Second, one of the interesting puzzles of the so-called drone wars is why so few remotely piloted vehicles (RPVs) get shot down. Most RPVs are slow and don't fly that high, which would makes them vulnerable to relatively unsophisticated anti-aircraft weapons. Even the most elusive drones would be invulnerable to fighter aircraft or advanced anti-aircraft missiles. Serbia reportedly shot down some fifteen U.S. drones in the Kosovo War, and Iran may -- repeat, may -- have forced one down over its territory last year.

There are two obvious reasons why we don't lose more drones. One is that some governments (e.g., Pakistan) that object to their use are protesting too much: they are not so angered by drone strikes that they are willing to start shooting them down. Another is the fact that the Taliban and al Qaeda don't have access to sophisticated anti-aircraft weaponry, and nobody is going to provide it to them. Even states like Russia and China aren't overly fond of non-state terrorist organizations, which makes it much harder for the groups that we are targeting with drones to acquire counter-measures that might equalize the situation. But note: this situation also means that the relatively passive environment that we've been exploitng in places like Yemen or Pakistan may not be the norm, and things might be quite different if we went up against a foe that had better anti-aircraft capabilities and was willing to use them.

Third, I couldn't help but consider what the RPV revolution tells us about the future of the manned space program. Homo sapiens has many interesting and attractive qualities, but we also have real physical limitations and keeping us alive in demanding environments like space is very hard and expensive. Sending machines to explore space makes a lot more sense than sending human beings; we will learn more at far less cost if we abandon our romantic notions of "space exploration" by humans and send sophisticated machines instead.

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Stephen M. Walt is the Robert and Renée Belfer professor of international relations at Harvard University.

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