How did the Hippies influence the culture of the 1960s?

Ah, the wonderful 'Sixties! First, understand that the
hippies were in no way an organized group or movement. No one joined and there were no
set guidelines to becoming a hippie. It was, in fact, a yourthful subculture that began
in the United States and quickly became an international phenomena. The two most
renowned early hotspots for the movement were in Greenwich Village (New York City) and
the Haight-Ashbury district (San Francisco). The word "hippie" derived from the word
"hipster," which evolved as a later synonym for "beatnik"--the youth who followed the
ways and customs of the Beat Generation. Hippies generally wore their hair long, dressed
colorfully and unconventionally, listened to the most modern rock music (especially
psychedelic and hard rock), used drugs freely and often, and embraced sexual freedom.
The transition to the hippie subculture was a conscious decision in response to the
restrictions of parents or conservative upbringing. Youthful opposition to the Vietnam
War was another motivation. Events such as the Be-In in San Francisco's Golden Gate Park
in early 1967 and the year's later Summer of Love, and the 1969 Woodstock Festival in
New York came to define the movement. The advent of the hippie effected the world's
culture significantly, particularly with the burgeoning rock music scene, but the hippie
culture became visible on TV, movies, health foods, fashion, art and
literature.