Human beings, each considered as a single actor within society
- Dalberg-Acton, John - British historian, known as Lord Acton
- Dawkins, Richard - British zoologist, author of The Selfish Gene
- Demento, Dr. - Radio DJ, hosts two-hours of "mad music and crazy comedy"
- De Soto, Hernando - Economist, founder of Instituto Libertad y Democracia
- DiLorenzo, Thomas J. - Professor of economics and author
- Directors and Producers - Film, TV and stage directors, producers and other crew
- Dixon, Michael - Management consultant, national chair of the U.S. Libertarian Party (2004- )
- Dooling, Richard - American novelist, co-writer of Stephen King's "Kingdom Hospital" TV miniseries
- Douglass, Frederick - 19th century American abolitionist, known for his autobiography as a slave
- Downs, Hugh - Past host of the ABC News "20/20" newsmagazine, radio commentator for "Perspectives"
- Drolet, Leon - State representative in the Michigan House of Representatives
- Drudge, Matt - Pioneer of Internet journalism, author of the "Drudge Report" news website
- Dyson, Esther - Editor at large at CNET Networks, editor of technology newsletter Release 1.0
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