The out gay black civil rights leader you’ve never heard of.

American civil rights activist Bayard Rustin, pictured in 1964, as spokesman for the Citywide Committee for Integration, at the organization's headquarters, Silcam Presbyterian Church in New York City. (Patrick A. Burns/New York Times Co./Getty Images)

He was an adviser to Martin Luther King Jr. and the organizer behind the 1963 March on Washington.

Still, Bayard Rustin’s legacy as a leading figure in the civil rights movement is little known today, even among many history buffs…