Introduction
All historians must grapple with the complexities of continuity and change. Yet those who study twentieth-century German history face greater difficulties than most, given the variety of political regimes Germany experienced in that era and their major differences in ideology, degree of stability, and relations with their neighbors. Some Germans, such as former West German Chancellor Willy Brandt, born in 1913, and former East German leader Erich Honecker, born in 1912, experienced all the changes, from childhood under the Kaiser through World War I, the Weimar Republic, the Nazis' “Twelve-Year Reich” (in exile and prison, respectively), the occupation regimes, forty years of what Brandt called “two states in one nation,” and the (re)unification of 1990.