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