-
1924
Henry Gerber, in Chicago, formed the Society for Human Rights, the country's earliest known gay rights organization. -
1948
Alfred Kinsey published Sexual Behavior in the Human Male, revealing that homosexuality was far more widespread than commonly believed. -
1951
The Mattachine Society was formed by Henry Hay. Henry Hay is considered to be the founder of the gay rights movement. -
1955
The Daughters of Bilitis, the first lesbian-rights organization in the United States, was established in San Francisco. . -
1962
Illinois became the first state in the union to decriminalize homosexual acts between consenting adults in private.