Human beings, each considered as a single actor within society
Featured Individuals
- Aristotle (Ἀριστοτέλης; 384-322 BCE) - Greek philosopher, tutor of young Alexander the Great
Notable Individuals
- Activists - Individuals who take direct action to achieve a social or political end
- Adams, John (1735-1826) - Second President of the United States
- Armentano, Dominick T. (1940- ) - Economics professor (emeritus) at the University of Hartford
- 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 (1925-2010) - Founder of the Universidad Francisco Marroquín, Guatemala
Other Individuals
- Agrippina, Julia (IVLIA AGRIPPINA; 15-59) - Granddaugher of Roman emperor Augustus, sister of Caligula, fourth wife of Claudius and mother of Nero
- Alexander the Great (Ἀλέξανδρος; 356-323 BCE) - King of Macedonia, who built an empire from Greece to the Indus river and south into Egypt
- Aquinas, Thomas (Tommaso d'Aquino; 1225-1274) - Italian theologian and philosopher, author of Summa Theologiae
- Aristogeiton (Ἀριστογείτων) - Older lover of Harmodius; the two Athenians assassinated Hipparchus (brother of the tyrant Hippias) and became celebrated as the Tyrannicides
- Artaxerxes II (Ἀρταξέρξης) - King of the Achaemenid Empire (404-358 BCE)