The East-West confrontation over Ukraine, which led to Moscow’s annexation of Crimea but long predated it, is potentially the worst international crisis in more than fifty years—and the most fateful. A negotiated resolution is possible, but time may be running out.

A new Cold War divide is already descending in Europe—not in Berlin but on Russia’s borders. Worse may follow. If NATO forces move toward western Ukraine or even to its border with Poland, as is being called for by zealous cold warriors in Washington and Europe, Moscow is likely to send its forces into eastern Ukraine. The result would be a danger of war comparable to the Cuban missile crisis of 1962.

Even if the outcome is the non-military “isolation of Russia,” today’s Western mantra, the consequences will be dire. Moscow will not bow but will turn, politically and economically, to the East, as it has done before, above all to fuller alliance with China. The United States will risk losing an essential partner in vital areas of its own national security, from Iran, Syria and Afghanistan to threats of a new arms race, nuclear proliferation and more terrorism. And—no small matter—prospects for a resumption of Russia’s democratization will be terminated for at least a generation.

Why did this happen, nearly twenty-three years after the end of Soviet Communism, when both Washington and Moscow proclaimed a new era of “friendship and strategic partnership”? The answer given by the Obama administration, and overwhelmingly by the US political-media establishment, is that President Vladimir Putin is solely to blame. The claim is that his “autocratic” rule at home and “neo-Soviet imperialist” policies abroad eviscerated the partnership established in the 1990s by Bill Clinton and Boris Yeltsin. This fundamental premise underpins the American mainstream narrative of two decades of US-Russian relations, and now the Ukrainian crisis.

But there is an alternative explanation, one that’s more in accord with historical facts. Beginning with the Clinton administration, and supported by every subsequent Republican and Democratic president and Congress, the US-led West has unrelentingly moved its military, political and economic power ever closer to post-Soviet Russia. Spearheaded by NATO’s eastward expansion, already encamped in the three former Soviet Baltic republics on Russia’s border—and now augmented by missile defense installations in neighboring states—this bipartisan, winner-take-all approach has come in various forms.

They include US-funded “democracy promotion” NGOs more deeply involved in Russia’s internal politics than foreign ones are permitted to be in our country; the 1999 bombing of Moscow’s Slav ally Serbia, forcibly detaching its historic province of Kosovo; a US military outpost in former Soviet Georgia (which, along with Ukraine, was one of Putin’s previously declared “red lines”), contributing to a brief proxy war in 2008; and, throughout, one-sided negotiations, called “selective cooperation,” which took concessions from the Kremlin without meaningful White House reciprocity and followed by broken American promises.

All of this has unfolded, sincerely on the part of some of its proponents, in the name of “democracy” and “sovereign choice” for the many smaller countries involved, but the underlying geopolitical agenda has been clear. During the first East-West conflict over Ukraine, occasioned by its 2004 “Orange Revolution,” an influential Republican columnist, Charles Krauthammer, acknowledged, “This is about Russia first, democracy only second.… The West wants to finish the job begun with the fall of the Berlin Wall and continue Europe’s march to the east.… The great prize is Ukraine.” The late Richard Holbrooke, an aspiring Democratic secretary of state, concurred, hoping even then for Ukraine’s “final break with Moscow” and to “accelerate” Kiev’s membership in NATO.

That Russia’s political elite has long held this same menacing view of US intentions makes it no less true—or any less consequential. Formally announcing the annexation of Crimea on March 18, Putin vented (not for the first time) Moscow’s longstanding resentments. Several of his assertions were untrue and alarming, but others were reasonable, or at least understandable, not “delusional.” Referring to Western (primarily American) policy-makers since the 1990s, he complained bitterly that they were “trying to drive us into some kind of corner,” “have lied to us many times” and in Ukraine “have crossed the line,” warning: “Everything has its limits.”

We are left, then, with profoundly conflicting Russian-Western narratives and a political discourse of the uncomprehending, itself often the prelude to war. Putin has been demonized for years, so little he says on Moscow’s behalf receives serious consideration in Washington. His annexation speech, for example, was dismissed as a “package of fictions” by former secretary of state Madeleine Albright. Nothing in Washington’s replies diminishes Putin’s reasonable belief that the EU trade agreement rejected by Ukrainian President Viktor Yanukovych in November, and Yanukovych’s overthrow in February by violent street protests, leading to the current "illegitimate" government, were intended to sever Ukraine’s centuries-long ties with Russia and bind it to NATO. (Today’s crisis was triggered by the EU’s reckless ultimatum, despite Putin’s offer of a “tripartite” agreement, which compelled an elected president of a deeply divided country to choose economically between the West and Russia, an approach since criticized by former German chancellors Helmut Kohl and Gerhard Schröder. The EU’s proffered “partnership” also included little-noticed “security” provisions requiring Ukraine’s “convergence” with NATO policies, without mentioning the military alliance.)

Meanwhile, on both sides, belligerent rhetoric escalates, military forces are being mobilized and provocations mount in Ukraine’s political civil war, with toughs in black masks, armed militias, “spontaneous” secessionist demonstrations and extremist statements by some of Kiev’s would-be leaders. Anything is now possible—actual civil war, Ukraine’s partition and worse. Tit-for-tat “sanctions” are mostly a perfunctory sidebar that only exacerbates the situation.

There is a diplomatic way out. Putin did not begin or want this crisis; among other costs, it obliterated the achievement of his Sochi Olympics. Nor did he initiate the unfolding Cold War, which was inspired in Washington years before he came to power. Western policy-makers should therefore take seriously the adage, “There are two sides to every story.” Is Putin right, as he also asserted on March 18, that Russia “has its own national interests that must be taken into account and respected,” particularly along its borders? If the answer is no, as it has seemed to be since the 1990s—if Putin is correct in angrily protesting, “Only they can ever be right”—then war is possible, if not now, eventually. But if the answer is yes, proposals made by Putin’s foreign ministry on March 17 could be the starting point for negotiations.

Briefly summarized, those proposals call for a US-Russian-EU contact group that would press for immediate disarming of militias in Ukraine, as the Ukrainian Parliament ordered on April 1; a new federal Constitution giving more autonomy to pro-Russian and pro-Western regions; internationally monitored presidential and parliamentary elections; and a “neutral military-political” (that is, non-NATO) government in Kiev shorn of its extreme nationalist (some observers think “neofascist”) ministers; and maintaining Ukrainian-Russian economic relations essential to both countries. In turn, Moscow would recognize the legitimacy of the new government and Ukraine’s territorial integrity, thereby disavowing pro-Russian separatist movements well beyond Crimea, though without returning the annexed peninsula. It would also vote for a UN Security Council resolution affirming the settlement and, possibly, contribute to the multibillion dollars needed to save the country from financial collapse.

The Obama administration’s reaction to Moscow’s proposals, which it has barely acknowledged publicly, is less than adequate. While accepting the need for some kind of federal Ukrainian Constitution and a presidential election, the White House opposes new parliamentary elections, which would leave the existing Parliament strongly influenced, even intimidated, by its ultranationalist deputies and their armed street supporters, who recently threatened to impose their will directly by entering the building. Nor is it clear how fully Obama shares Putin’s concern that militias are further destabilizing the country.

Meanwhile, the White House says Moscow should annul Crimea's annexation (a nonstarter), remove its forces on Ukraine's borders and recognize the unelected Kiev regime. Moreover, nothing the West has said suggests that it no longer intends to expand NATO to Ukraine; indeed, on March 31, NATO’s political chief, echoing Krauthammer from a decade ago, declared that the military alliance’s “task is not yet complete.” Still worse, Brussels may use the crisis to deploy troops deeper into Eastern Europe, toward Russia.

Even if these differences narrow, would Putin be a reliable partner in such negotiations? “Demonization of Vladimir Putin,” Henry Kissinger recently wrote, “is not a policy.” Nor does it recall that the Russian leader has assisted US and NATO troops in Afghanistan since 2001; supported harsher sanctions against Iran in 2010; repeatedly called for “mutually beneficial cooperation” with Washington; generally pursued a reactive foreign policy; and, as a result, been accused by harder-line elements in his own political class of appeasing the West. (No, Putin is not an all-powerful “autocrat”; and, yes, there is a high-level politics around him.)

Much, therefore, now depends on President Obama. He will have to rise to the kind of leadership capable of rethinking a twenty-year bipartisan policy that has led to disaster, and do so in Washington’s rabid anti-Putin, Russophobic atmosphere. There is a precedent. Three decades ago, America’s most Cold War president ever, Ronald Reagan, sensing in Soviet leader Mikhail Gorbachev enough in common, resolved to meet him halfway, despite protests by close advisers and much of his own party. Together, those two leaders achieved such historic changes that both believed they had ended the Cold War forever.