Lesbian, gay, bisexual, and transgender (LGBT) social movements are social movements that advocate for LGBT people in society. Social movements may focus on equal rights, such as the 2000s movement for same-sex marriage, or they may focus on liberation, as in the gay liberation movement of the 1960s and 1970s. Earlier movements focused on self-help and self-acceptance, such as the homophile movement of the 1950s. Although there is not a primary or an overarching central organization that represents all LGBT people and their interests, numerous LGBT rights organizations are active worldwide. The earliest organizations to support LGBT rights were formed in the early 20th century.