M. M. (Mangasar Mugurditch) Mangasarian

Mangasar Mugurditch Mangasarian (1859–1943), often published as M. M. Mangasarian, was an Armenian American rationalist, secularist, lecturer, and author. Standard library and reference sources identify him as born in the Ottoman Empire, educated at Robert College in Constantinople, and later active in the United States.

He first trained for the ministry and served as a Presbyterian pastor in Philadelphia before turning away from orthodox Christianity. He became widely known for public lectures and books that challenged traditional religious belief and argued for a more skeptical, human-centered view of ethics and society.

Today he is remembered mainly through his freethought writing, including titles such as The Bible Unveiled, and through the many public-domain editions of his work that still circulate online and in libraries.