1960s

1947–1991 tension between the Soviet Union and the United States and their respective allies

File:1960s montage.png|Clockwise from top left: U.S. soldiers during the Vietnam War; the Beatles led the British Invasion of the U.S. music market that subsequently spread worldwide, pictured here first landing in the U.S. in 1964; a half-a-million people participate in the 1969 Woodstock Festival; Neil Armstrong and Buzz Aldrin walk on the Moon during the Cold War-era Space Race; the Stonewall riots mark the beginning of the gay liberation movement; China's Mao Zedong initiates the Great Leap Forward plan which fails and brings mass starvation in which 15 to 55 million people died by 1961, a

cultural phenomenon that developed first in the United States and United Kingdom and spread throughout much of the Western world between the early 1960s and the early 1970s

theory of social movements that attempts to explain the plethora of new movements that have come up in various western societies roughly since the mid-1960s

proposed sovereign federal union