In 1989, from East Berlin to Budapest and Bucharest to Moscow, communism was falling. The walls were coming down and the world was being changed in ways that seemed entirely new. The conflict of ideas and ideals that began with the French Revolution of 1789 culminated in these revolutions, which raised the prospects of the "return to Europe" of East and Central European nations, the "restarting of their history," even, for some, the "end of history."...