The Spirit of Socialism is a cultural history of the Soviet collapse. It takes as its object the millions of former-Soviet people who, amidst the cascading crises of the collapse and the post-Soviet transition, embarked on a spirited and highly-visible search for new meaning. Amidst profound disorientation, these seekers found direction in their horoscopes, or behind gurus in saffron robes or apocalyptic preachers, or by turning from the most basic premises of official science and history to orient themselves anew. The beliefs they seized on, and even more, the questions that guided their search, reveal the essence of late-Soviet culture and its legacy in post-Soviet Russia. To skeptical outsiders, the seekers appeared eccentric, deviant, and above all un-Soviet. Yet they came to their ideas by Soviet sources and Soviet premises. As Joseph Kellner demonstrates, their motley beliefs reflect modern values that formed the spiritual core of Soviet ideology, among them a high regard for science, an informed and generous internationalism, and a confidence in humanity to chart its own course. Soviet ideology failed, however, to unite these values in an overarching vision that could withstand historical change. And so, as The Spirit of Socialism ably shows, the seekers asked questions raised but not resolved by the Russian Revolution and subsequent Soviet order—questions of epistemic authority, of cultural identity, and of history's ultimate meaning. Although the Soviet collapse was not the end of history, it was a rupture of epochal significance, whose fissures extend into our own uncertain era.