She founded , in 1974 , the first gay organization in Mexico , Frente de Liberación Homosexual Mexicano ( FLHM ; Mexican Homosexual Liberation Front ) . As a feminist and sexology specialist she also held numerous conferences , seminars and national and international television interviews on the subject . In 1975 , along with Carlos Monsiváis , she wrote the Manifesto in Defense of Homosexuals in Mexico . On October 2 , 1978 , during the march in commemoration of the Tlatelolco massacre , she headed the first gay pride march in the Plaza de las Tres Culturas
Tlatelolco massacre
Tlatelolco massacre
Nancy Cárdenas