After the Wall Street Crash of 1929, the largest stock market crash in American history, most of the decade was consumed by an economic downfall called the Great Depression that had a traumatic effect worldwide, leading to widespread unemployment and poverty, especially in the United States, an economic superpower, and Germany, who had to deal with the reparations regarding World War I. The Dust Bowl (which gives the nickname the Dirty Thirties) in the United States further emphasised the scarcity of wealth. Herbert Hoover worsened the situation with his failed attempt to balance the budget by raising taxes. Franklin D. Roosevelt was elected, as a response, in 1933, and introduced the New Deal. The founding of the Civilian Conservation Corps (CCC) and the funding of numerous projects (e.g. the Hoover Dam ) helped restore prosperity in the US.
Meanwhile, authoritarian regimes emerged in several countries in Europe and South America, in particular the Third Reich in Germany. Germany elected Adolf Hitler, who imposed the Nuremberg Laws, a series of laws which discriminated against Jews and other ethnic minorities. Weaker states such as Ethiopia, China, and Poland were invaded by expansionist world powers, the last of these attacks leading to the outbreak of the World War II on September 1, 1939, despite calls from the League of Nations for worldwide peace. World War II helped end the Great Depression when governments spent money for the war effort. The 1930s also saw a proliferation of new technologies, especially in the fields of intercontinental aviation, radio, and film.
