Twenty years ago, the Berlin Wall fell. In one of modern history's most miraculous occurrences, communism imploded-and not with a bang, but with a whimper. Now two of the foremost scholars of East European and Soviet affairs, Stephen Kotkin and Jan T. Gross, drawing upon two decades of reflection, revisit this crash. In a crisp, concise, unsentimental narrative, they employ three case studies-East Germany, Romania, and Poland-to illuminate what led...