Past Masters This link opens in a new windowPast Masters is a collection of primary source full-text editions in philosophy. The series includes collections in the history of political thought and theory, religious studies, education, German studies, sociology, the history and philosophy of science, economics, and classics. The publisher acquires and develops definitive editions of the full corpora of the seminal figures in the history of the human sciences, including published and unpublished works, articles, essays, reviews, and correspondence.