Hitler at the Nuremberg rally of 1936In 1914 a social order that in many ways had changed little since the mid-nineteenth century was shattered beyond repair. When Austria declared war on Serbia, a web of alliances brought all the great   ' nations of Europe into the conflict. British and French armies faced the Germans across trenches that stretched from the English Channel to the Swiss frontier. In Eastern Europe the long war demoralized the Russian army; the Tsar abdicated and a provisional government was formed in Russia, only to be overthrown by a Communist revolution. America's entry into the war ensured the defeat of Germany but the peace treaties that followed sowed the seeds of future conflict. In the late 1920s the Great Depression created mass unemployment throughout the industrial world. Hitler brought the Nazis to power in Germany, establishing a ruthless dictatorship, equalled only by the Stalinist regime in the Soviet Union. Hitler's territorial ambitions led to the outbreak of hostilities in Europe in 1939; as the Soviet Union, the United States and Japan entered the war, the conflict became global. It ended in 1945 with the defeat of Germany and Japan, but at a dreadful cost in human suffering. The atomic bomb changed for-ever the concept of warfare.  

In the early twentieth century the notion of art as an imitation of nature was overturned by the Cubism of Picasso and Braque. Other movements, such as Dadaism, stressed the irrational and the absurd, while Surrealism explored the subconscious mind. In Germany the Bauhaus school of architecture created the functional design that was so popular during the interwar years.

English music achieved world stature through Elgar and Vaughan Williams, and in the United States, Ives produced music of great originality. Central to twentieth-century music were Schoenberg and his successors, who rejected traditional- ideas of harmony and melody.

Composers

Sergei Rachmaninov

Bela Bartok

Gustav Holst

Igor Stravinsky

Heitor Villa-Lobos