Individuals who purchase human beings for sex fuel the market that traffickers and pimps supply with victims. Until we eliminate demand, the sexual exploitation of our society’s most vulnerable children, women, and even men will continue unabated. Supporting victims and survivors and punishing pimps remains a critical need, but a growing number of policymakers, academics, and activists are beginning to recognize that the endless supply of victims won’t cease until we combat the driver of sex trafficking: demand for illegal commercial sex.