Biographical materials include a handwritten critique of public education (perhaps prepared to be delivered as a speech) written by Lopatin in his last semester of high school. Correspondence includes notes from Norman Thomas and Upton Sinclair. Leaflets include one published by the Sacco-Vanzetti Defense Committee in 1927 and another advertising an anti-war rally sponsored by the Socialist Party in the 1935. Materials from the League for Industrial Democracy (LID) include a report on the tumultuous Chicago New Politics Convention of 1967, a confidential report on the June 1969 convention of Students for a Democratic Society (SDS), proposed guidelines for school decentralization in New York City (in the wake of the 1968 New York City teachers' strike centered on the dispute of over community control in Ocean-Hill Brownsville schools), and statements by LID board members (including by Irving Howe) on the future role of the organization.
