This article provides an overview of the atomistic philosophy of the pre-Socratic philosophers Leucippus and Democritus in the 5th and 4th centuries, BCE.

Read about the life of the Greek philosopher Socrates, the philosophy he developed, his influence, and his execution for impiety and for corrupting young people.

Encyclopedia entry about the Greek philosopher Socrates. Includes information about his life, trial and death, philosophy, links to additional information, and more.

Basic-level introduction to Socrates' life. Excellent summary of the main characteristics of Socrates' life in the three dialogues "Euthyphro," "Apology," and "Crito."

Site summarizes the philosophy of Socrates through condensed versions of Plato's dialogues. Subjects discussed are piety, an examined life, the individual and the state, and knowing virtue. Also presents a bibliography and internet links.

This looks at the historic problem of why Socrates was put on trial. The historical artifacts surrounding the trial are available online as are scholarly interpretations through the years.

Good introduction to his life and thought from the Internet Encyclopedia of Philosophy. Focuses especially on Empedocles' relationship to Pythagoras and his account of Love and Strife.

This encyclopedia entry surveys the life and thought of the 5th century BCE Greek philosopher Democritus, who proposed the existence of the atom.

History of Socrates written with elementary age students in mind provides an overview of Socrates, his philosophy and methods, as well as general facts about his life. Teacher resources included.

Read about the life of the Greek philosopher Plato, the philosophy he developed, and his legacy.