In the fall of 2015, Professor Cohen outlined his views on the Ukraine Crisis to the Commonwealth Club in San Francisco. Then, as now, the consensus view in Washington and in the U.S. mainstream media was that the Ukrainian crisis, which some have called the worst international crisis of our time, was due solely to Russian aggression under President Vladimir Putin. Cohen’s view, on the other hand, was that U.S. policy since the 1990s was largely responsible, and that unless this is acknowledged at least in part by Washington, no successful negotiated end to the crisis will be possible.