Harry Hay was an English-born American labor advocate, teacher and early leader in the American LGBT rights movement. He is known for his roles in helping to found several gay organizations, including the Mattachine Society, the first sustained gay rights group in the United States which in its early days had a strong Marxist influence. The "Encyclopedia of Homosexuality" reports: "As Marxists the founders of the group believed that the injustice and oppression which they suffered stemmed from relationships deeply embedded in the structure of American society". A longtime member of the CPUSA, Hay's Marxist history led to his resignation from the Mattachine leadership in 1953. Hay's involvement in the gay movement became more informal after that, although he did co-found the Los Angeles chapter of the Gay Liberation Front in 1969. As Hay became more involved in his Mattachine work, he correspondingly became more concerned that his homosexuality would negatively affect the CPUSA, which did not allow gays to be members. Hay himself approached party leaders and recommended his own expulsion. The party refused to expel Hay as a homosexual, instead expelling him as a "security risk" at the same time declaring him to be a "Lifelong Friend of the People". Homosexuality was classified as a psychiatric disorder in the 1950s. However, in the context of the highly politicised Cold War environment homosexuality became framed as a dangerous, contagious social disease that posed a potential threat to state security. This era also witnessed the establishment of widely spread FBI surveillance intended to identify homosexual government employees.