Leucippus or Leukippos was the first Greek to develop the theory of atomism — the idea that everything is composed entirely of various imperishable, indivisible elements called atoms — which was elaborated in far greater detail by his pupil...

Socrates was a classical Greek Athenian philosopher. Credited as one of the founders of Western philosophy, he is an enigmatic figure known chiefly through the accounts of later classical writers, especially the writings of his students Pla...

Thucydides was an Athenian historian and general. His History of the Peloponnesian War recounts the 5th century BC war between Sparta and Athens to the year 411 BC. Thucydides has been dubbed the father of "scientific history" by those who...

Hippocrates of Kos was an ancient Greek physician. He has been called "the father of medicine", and is commonly regarded as one of the most outstanding figures in medicine of all time. He was a physician trained at the Dream temple of Kos,...

Democritus ("chosen of the people") was an Ancient Greek philosopher born in Abdera, Thrace, Greece. He was an influential pre-Socratic philosopher who formulated an atomic theory for the cosmos. His exact contributions are difficult to dis...

Diagoras "the Atheist" of Melos was a Greek poet and sophist of the 5th century BC. Throughout antiquity, he was regarded as an atheist, but very little is known for certain about what he actually believed. Anecdotes about his life indicate...

The Acropolis of Athens is an ancient citadel located on a rocky outcrop above the city of Athens and contains the remains of several ancient buildings of great architectural and historic significance, the most famous being the Parthenon. A...

Alcibiades, son of Clinias, from the deme of Scambonidae, was a prominent Athenian statesman, orator, and general. He was the last famous member of his mother's aristocratic family, the Alcmaeonidae, which fell from prominence after the Pel...

Aristophanes, son of Philippus, of the deme Cydathenaus, was a prolific and much acclaimed comic playwright of ancient Athens. Eleven of his forty plays survive virtually complete. These, together with fragments of some of his other plays,...

Isocrates, an ancient Greek rhetorician, was one of the ten Attic orators. In his time, he was probably the most influential rhetorician in Greece and made many contributions to rhetoric and education through his teaching and written works....

The Peloponnesian War was an ancient Greek war fought by Athens and its empire against the Peloponnesian League led by Sparta. Historians have traditionally divided the war into three phases. In the first phase, the Archidamian War, Sparta...

Xenophon of Athens was an Athenian-born mercenary, philosopher and historian. At the age of 30, he was elected a commander of the Ten Thousand, a force of Greek mercenaries in the service of Cyrus the Younger. He wrote the Anabasis, which r...

Plato was a philosopher in Classical Greece and the founder of the Academy in Athens, the first institution of higher learning in the Western world. He is widely considered the most pivotal figure in the development of philosophy, especiall...

Diogenes, also known as Diogenes the Cynic, was a Greek philosopher and one of the founders of Cynic philosophy. He was born in Sinope, an Ionian colony on the Black Sea coast of modern day Turkey, in 412 or 404 BC and died at Corinth in 32...

Demosthenes, Athenian politician, has always been regarded as the greatest orator of Antiquity, and it is not exaggerated to say that his death marked the end of Greek political speech. Many of his speeches have survived, because in the thi...