Human beings, each considered as a single actor within society
Notable Individuals
- Dalberg-Acton, John (1834-1902) - British historian, known as Lord Acton
- Douglass, Frederick (1818-1895) - 19th century American abolitionist, known for his autobiography as a slave
Other Individuals
- D'Amato, David S. - Attorney, policy advisor to the Future of Freedom Foundation
- Darius I (Δαρεῖος; 550-486 BCE) - King of the Achaemenid Empire (522-486 BCE)
- Davis, Glenn Robert (1914-1988) - Politician, member of the United States House of Representatives from Wisconsin (1947-1957, 1965-1974)
- Davis, Horace B. (1898-1999) - American professor of economics
- Davis, Jefferson (1808-1889) - President of the Confederate States of America
- Davis, John (1787-1854) - American lawyer and politician, governor of Massachusetts (1834-1835, 1841-1843)
- Dawkins, Clinton Edward (1859-1905) - British bureaucrat, partner in the London branch of J. S. Morgan & Co.
- Dawkins, Richard (1941- ) - British zoologist, author of The Selfish Gene
- Dawson, William L. (1886-1970) - Politician, member of the United States House of Representatives from Illinois (1943-1970)
- Dayton, Sky (1971- ) - Founder of Earthlink and Boingo Wireless
- Dazey, Ruth ( -1977) - Secretary to Robert LeFevre, editor of the Rampart Journal of Individualist Thought
- Debs, Eugene V. (1855-1926) - American political activist, five-time presidential candidate for the Socialist Party of America
- de Havilland, Olivia (1916-2020) - British-American actress, winner of two Oscar Best Actress awards
- de la Vega, Elizabeth - Former U.S. federal prosecutor, author of United States v. George W. Bush et al. (2006)
- del Valle, Pedro (1893-1978) - American military officer, lieutenant general of the United States Marine Corps
- Demento, Dr. (1941- ) - Radio DJ, hosts two-hours of "mad music and crazy comedy"
- DeMille, Nelson (1943- ) - American bestselling mystery writer
- Deming, W. Edwards (1900-1993) - 20th century American statistician
- De Niro, Robert (1943- ) - American Oscar-winning actor, starred in Raging Bull and Godfather II
- De Quincey, Thomas (1785-1859) - English writer, author of the autobiographical Confessions of an English Opium-Eater (1821)
- Derounian, Arthur (1909-1991) - Journalist, known as John Roy Carlson, author of Under Cover (1943)
- Dewey, Douglas - President of the National Scholarship Center, Washington, DC
- Dewey, John (1859-1952) - American pragmatist philosopher, educational reformer
- Dewey, Thomas E. (1902-1971) - Politician, governor of New York (1943-1954), Republican presidential candidate in 1944 and 1948
- DiLorenzo, Thomas (1954- ) - Professor of economics and author
- Diodorus Siculus (Διόδωρος) - Greek historian who lived in Sicily during the first century BCE
- Dion of Syracuse (Δίων ὁ Συρακόσιος; 408-354 BCE) - Brother-in-law of Dionysius I, who was banished by Dionysius II (son of Dionysius I) but eventually returned to Syracuse and deposed the latter
- Dionysius I (Διονύσιος; 430-367 BCE) - Tyrant of Syracuse (405-367 BCE)
- Dirksen, Everett (1896-1969) - Politician, United States senator from Illinois (1951-1969)
- Doherty, Brian - Senior editor at Reason magazine, author of Radicals for Capitalism (2007)
- Domitian (DOMITIANVS AVGVSTVS GERMANICVS; 51-96) - Roman emperor in the years 81-96 CE
- Dǒng Zhòngshū (董仲舒; 179-104 BCE) - Chinese philosopher and writer
- Dooling, Richard (1954- ) - American novelist, co-writer of Stephen King's "Kingdom Hospital" TV miniseries
- Douglas, Kirk (1916-2020) - American actor, star of Paths of Glory and Spartacus, recipient of the AFI Life Achievement award
- Douglas, Lewis (1894-1974) - Politician, member of the United States House of Representatives from Arizona (1933-1934)
- Douglas, Melvyn (1901-1981) - American stage and movie actor, winner of Oscar, Tony and Emmy awards
- Douglas, Paul (1892-1976) - Politician, United States senator from Illinois (1949-1967)
- Downs, Hugh (1921-2020) - Past host of the ABC News "20/20" newsmagazine, radio commentator for "Perspectives"
- Drennan, Tammy - Homeschooling advocate, senior writer for Alliance for the Separation of School & State
- Dreyfuss, Richard (1947- ) - American actor, winner of Oscar for The Goodbye Girl
- Drolet, Leon (1967- ) - State representative in the Michigan House of Representatives
- Drucker, Peter (1909-2005) - 20th century Austrian-born American author and professor of management
- Drudge, Matt (1966- ) - Pioneer of Internet journalism, author of the "Drudge Report" news website
- Drummond, Roscoe (1902-1983) - American political journalist
- Dubinsky, David (1892-1982) - American labor leader, president of the International Ladies' Garment Workers Union (1932-1966)
- Dulles, John Foster (1888-1959) - Politician, United States Secretary of State (1953-1959)
- Dunaway, Faye (1941- ) - American movie actress, winner of Best Actress Oscar for Network
- Dunoyer, Charles (1786-1862) - French economist, co-founder of Le Censeur
- Dupin, Charles (1784-1873) - French mathematician, politician, engineer and economist
- Dutt, R. Palme (1896-1974) - British journalist, General Secretary of the Communist Party of Great Britain (1939-1941)
- Duvall, Robert (1931- ) - American movie actor, producer and director
- Dyson, Esther (1951- ) - Editor at large at CNET Networks, editor of technology newsletter Release 1.0