In the first half of the 20th century, there were two major military conflicts of global reach that changed the politics and economy in the world. They were called World War I (1914-1918) and World War II (1939-1945). There was also a period of great economic crisis between these two wars, named The Great Depression (1929-1939). The second half of the 20th century was marked by a non-military conflict between capitalist and socialist countries, the Cold War (1947-1991). The Cold War began as a result of World War II, and brought a lot of changes in global culture. In 1991, after the dissolution of the Soviet Union and the consequent end of the Cold War, people come to believe that the world has achieved "peace". But this is not true. The end of the Cold War brought a series of unprecedente