The provided text serves as a comprehensive biographical and academic overview of the ancient Athenian historian Thucydides, who is best known for chronicling the Peloponnesian War. It details his transition from a military general to a scholar after his exile, highlighting his foundational role in developing "scientific history" through evidence-based analysis rather than divine intervention. The sources explore his enduring influence on political realism, noting how his theories on state power, fear, and self-interest remain central to international relations today. Comparisons are drawn between his rigorous, factual style and the more narrative, moralistic approach of his predecessor, Herodotus. Finally, the t ...