(Many hoped that the 1920s, which saw the growth of the League of Nations and a series of peace pacts, would signal the dawn of a peaceful new era after the ravages of the First World War and its aftermath. The events of the 1930s shattered these hopes and expectations. Starting with the Great Depression, this book charts the emergence of fascist and communist regimes, the collapse of collective security in the face of aggression on both sides of the world, and the final crises leading to war in Europe in 1939, with the spread of hostilities to a global scale in 1941)