He was the chairman of the First United States Philippine Commission in 1899, and wrote (besides a part of the official report to Congress) Philippine Affairs--A Retrospect and an Outlook (1902). With J. E. Creighton and James Seth he founded in 1892 The Philosophical Review. He also wrote Kantian Ethics and the Ethics of Evolution (1881); The Ethical Import of Darwinism (1888); Belief in God (1890), and Agnosticism and Religion (1896).
