21st-century American philosophers

Francis William Lawvere (; February 9, 1937 – January 23, 2023) was an American mathematician known for his work in category theory, topos theory and the philosophy of mathematics.

J. Michael Dunn (June 19, 1941 – April 5, 2021) was Oscar Ewing Professor Emeritus of Philosophy, professor emeritus of Informatics and Computer Science, was twice chair of the Philosophy Department, was Executive Associate Dean of the College of Arts and Sciences, and was founding dean of the School of Informatics (now the Luddy School of Informatics, Computing, and Engineering) at Indiana University.

Thomas Michael "Tim" Scanlon (; born 1940), usually cited as T. M. Scanlon, is an American philosopher. At the time of his retirement in 2016, he was the Alford Professor of Natural Religion, Moral Philosophy, and Civil Polity in Harvard University's Department of Philosophy, where he had taught since 1984. He was elected to the American Philosophical Society in 2018.

Richard Theodore Tarnas is a cultural historian and astrologer known for his books The Passion of the Western Mind: Understanding the Ideas That Have Shaped Our World View and Cosmos and Psyche: Intimations of a New World View. Tarnas is professor of philosophy and psychology at the California Institute of Integral Studies, and is the founding director of its graduate program in Philosophy, Cosmology, and Consciousness.