Human beings, each considered as a single actor within society
  • Activists - Individuals who take direct action to achieve a social or political end
  • Acton, Lord John - British historian, known as Lord Acton
  • Actors and Actresses - Performers on film, television or plays
  • Adams, Charles - Attorney, tax historian and author
  • Adams, John - Second President of the United States
  • Adams, Samuel - American revolutionary leader, organizer of the Boston Tea Party
  • Alberdi, Juan Bautista - Argentine jurist, considered the "Father" of the Argentine Constitution
  • Allen, Woody - American director, actor and screenwriter, won Best Director Oscar for Annie Hall
  • Almodovar, Norma Jean - Los Angeles traffic officer turned call girl, and subsequently activist and author
  • Andersen, Hans Christian - Nineteenth-century Danish writer, author of dozens of fairy tales
  • Anderson, Poul - American science fiction author, winner of several Prometheus Awards
  • Aristotle - Greek philosopher, tutor of young Alexander the Great
  • Armentano, Dominick T. - Economics professor (emeritus) at the University of Hartford
  • Athletes - Professional or amateur sportsmen and sportswomen
  • Attorneys and Judges - Members of the legal profession
  • Authors - Fiction and non-fiction writers of books, stories and other literature
  • Authors, Science Fiction - Writers of fictional accounts with scientific or pseudo-scientific bases
  • Ayau, Manuel F. - Founder of the Universidad Francisco MarroquĂ­n, Guatemala
  • Ayittey, George B. N. - Professor of economics at American University, president of the Free Africa Foundation