The following is a list of notable people presently or previously associated with the city of Philadelphia, Pennsylvania: Academia Joseph Addison Alexander (1809–1860), former clergyman and biblical scholar E. Digby Baltzell (1915–1996), former sociologist, author, and professor at the University of Pennsylvania Ellen Bass (born 1947), professor, poet, and author Leon Bass (1925–2015), former educator and Benjamin Franklin High School principal Aaron Beck (1921–2021), former psychiatrist, inventor of cognitive therapy, and Penn School of Medicine professor Algernon Sydney Biddle (1847–1891), former lawyer and Penn Law School professor Ray Birdwhistell (1918–1994), former anthropologist, University of Pennsylvania professor, and inventor of kinesics Atherton Blight (1834–1909), former lawyer, businessperson, author, diarist, philanthropist, and Art Club of Philadelphia founding member Alfred Bloom, linguist, professor, and Swarthmore College president Francis Bohlen (1868–1942), former Penn Law School professor Derek Bok (born 1930), lawyer, former Harvard Law School dean, and former Harvard University president Lisa Bowleg, George Washington University social psychology professor Ruby Chappelle Boyd (born 1919), former librarian David D. Burns (born 1942), psychiatrist, author, Penn School of Medicine psychiatry professor Noam Chomsky (born 1928), linguist, Far-left political activist, anarchist, and professor Gordon Clark (1902–1985), former Christian theologian and professor C. Everett Coop (1916–2013), former U.S. Surgeon General Leda Cosmides (born 1957), psychologist, helped develop evolutionary psychology field Philip D. Curtin (1922–2009), former Africa historian on Atlantic slave trade Steven Drizin, lawyer and professor Drew Gilpin Faust (born 1947), historian, University of Pennsylvania administrator, and Harvard University president R. Buckminster Fuller (1895–1983), former architect, systems theorist, author, University of Pennsylvania design professor Andrew Gelman (born 1965), Columbia University professor, statistics and political science Gaylord P. Harnwell (1903–1982), former University of Pennsylvania professor and president Earl G. Harrison (1899–1955), former Penn Law School dean and former INS commissioner Marc Lamont Hill (born 1978), professor, journalist, activist, and BET News correspondent Agnes Irwin (1841–1914), former Agnes Irwin School founder and first dean of Radcliffe College Seymour S. Kety (1915–2000), former neuroscientist and schizophrenia researcher Lawrence Klein (1920–2013), former economist, Nobel laureate, University of Pennsylvania economics professor Byard Lancaster (1942–2012), former avant-garde jazz saxophonist and flutist Alain LeRoy Locke (1885–1954), former writer, philosopher, educator, and first African-American Rhodes Scholar Margaret Mead (1901–1978), former cultural anthropologist and author William Augustus Muhlenberg (1796–1877), considered father of parochial schools John Pittenger (1930–2009), former lawyer, academic, and former Pennsylvania House of Representatives member Philip Rieff (1922–2006), former sociologist, cultural critic, and University of