The concept of a sex binary is a recent invention of Western culture. Until the age of colonialism, variation in sexual characteristics was recognized as part of human diversity. Jewish traditions acknowledged 6 sexes. Ancient Greek medicine thought that different shades of male and female and everything in between mapped to different zones of the uterus. The war on intersex people really began in the 20th century when modern medicine decided typical genitalia were required for "normal" psychological development.