costs rose output fell from 2567 million tons in 1924 to 183 million in 1945. The Labour government nationalised the mines in 1947. Great Depression The Great Depression originated in the United States in late 1929 and quickly spread to the world. Britain had never experienced the boom that had characterized the US, Germany, Canada and Australia in the 1920s, so its bust appeared less severe. Britain's world trade fell in half (1929–1933), the output of heavy industry fell by a third, employment profits plunged in nearly all sectors. At the depth in summer 1932, registered unemployed numbered 3.5 million, and many more had only part-time employment. Experts tried to remain optimistic. John Maynard Keynes, who had not predicted the slump, said, "'There will be no serious direct consequences in London. We find the look ahead decidedly encouraging." On the left figures such as Sidney and Beatrice Webb, J. A. Hobson, and G. D. H. Cole repeated the warnings they had been making for years about the imminent death of capitalism, only now far more people paid attention. Starting in 1935 the Left Book Club provided a new warning every month, and built up the credibility of Soviet-style socialism as an alternative. Particularly hardest hit by economic problems were the north of England, Scotland, Northern Ireland and Wales; unemployment reached 70% in some areas at the start of the 1930s (with more than 3 million out of work nationally) and many families depended entirely on the dole. In 1936, by which time unemployment was lower, 200 unemployed men made a highly publicized march from Jarrow to London in a bid to show the plight of the industrial poor. Although much romanticized by the Left, the Jarrow Crusade marked a deep split in the Labour Party and resulted in no government action. Unemployment remained high until the war absorbed all the job seekers. George Orwell's book The Road to Wigan Pier gives a bleak overview of the hardships of the time. Appeasement Vivid memories of the horrors and deaths of the World War made Britain and its leaders strongly inclined to pacifism in the interwar era. The challenge came from dictators, first Benito Mussolini of Italy, then Adolf Hitler of a much more powerful Nazi Germany. The League of Nations proved disappointing to its supporters; it was unable to resolve any of the threats posed by the dictators. British policy was