The yippies were

a pro-war protest movement
one of the anti-war protest groups
a hip group of white-collar workers
a college campus fraternity

The Yippies were one of the anti-war protest groups.

The Youth International Party, whose supporters were known as "yippies", was an anti-authoritarian, pro-expression and antimilitarist political party established in the United States of America in 1967. Faced with the passive attitude and self-exclusion adopted by the "hippies", retiring to rural areas to adopt their communal model of life, the "yippies" were eminently urban. The Youth International Party, as a youth party, was aware that young people were the first major US electoral majority, and that there existed a great opportunity for social change for the ultraconservative American society of that time.

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