Definition: The word "Thucydides" appears in ancient Greek literature, specifically in Plato's Dialogues of Socrates and Phaedrus. It means "wise man," referring to a person who knows how to reason about events and decisions that result from them, making use of historical facts for guidance in solving problems. In the context of Thucydides, he was an ancient Greek philosopher known for his work on political theories and the nature of war.