The counterculture of the 1960s refers to an anti-establishment cultural phenomenon that developed first in the United Kingdom (UK) and the United States (US) and then spread throughout much of the Western world between the early 1960s and the mid-1970s, withLondon, New York City, and San Francisco being hotbeds of early countercultural activity. The aggregate movement gained momentum as the Civil Rights Movement continued to grow, and would later become revolutionary with the expansion of the U.S. government’s extensive military intervention in Vietnam. As the 1960s progressed, widespread social tensions also developed concerning other issues, and tended to flow along generational lines regarding human sexuality, women’s rights, traditional modes of authority, experimentation with psychoactive drugs, and differing interpretations of theAmerican Dream. Many key movements related to these issues were born or advanced within the counterculture of the 1960s.
https://en.m.wikipedia.org/wiki/Counterculture_of_the_1960s