Magnus Hirschfeld (1868-1935) was one of the first great pioneers of the gay liberation movement. Revered by such gay icons as Christopher Isherwood and Harry Hay, founder of the Mattachine Society, Hirschfeld's legacy resonates throughout the twentieth-century and around the world. Guided by his motto "Through Science Toward Justice," Hirschfeld helped found the Scientific Humanitarian Committee in Germany to defend the rights of homosexuals and develop a scientific framework for sexual equality. He was also an early champion of women's rights, campaigning in the early 1900s for the...