The Peloponnesian War (431-404 B.C.E.) was the greatest "disturbance" in Greek history to that time. The bitter rivalry between the two chief city-states, Athens and Sparta, and their respective allies ended with the ruin of Athens' naval hegemony and what the Greek historian Thucydides (ca. 460-400 B.C.E.) called a "convulsion" affecting all humankind. With the detachment of a clinician and the dramatic skill of a poet, Thucydides recreates the often savage events of the war and brings to life its chief protagonists: Pericles, Nicias, Cleon, Alcibiades, and others. The first of the "scientific" historians, Thucydides makes use of documentary material and relies on eyewitness accounts; even where direct documentary evidence is lacking, his keen understanding of human nature helps him to uncover the truth of what actually happened. The loftiness of its ideals, its painstaking research, and its beauty of expression have made the History of the Peloponnesian War a work that is in the author's own words, "a possession for all time."

Leviathan, The Matter, Forme and Power of a Common Wealth Ecclesiasticall and Civil, commonly called Leviathan, is a book written by Thomas Hobbes which was published in 1651. It is titled after the biblical Leviathan. The book concerns the structure of society and legitimate government, and is regarded as one of the earliest and most influential examples of social contract theory.

Thomas Hobbes' Leviathan is arguably the greatest piece of political philosophy written in the English language. Written in a time of great political turmoil (Hobbes' life spanned the reign of Charles I, the Civil Wars, the Commonwealth and the Protectorate, and the Restoration), Leviathan is an argument for obedience to authority grounded in an analysis of human nature. Since its first publication in 1991 Richard Tuck's edition of Leviathan has been recognised as the single most accurate and authoritative text, and for this revised edition Professor Tuck has provided a much amplified and expanded introduction, which will provide students unfamiliar with Hobbes with a cogent and accessible introduction to this most challenging of texts. Other vital aids to study include an extensive guide to further reading, a note on textual matters, a chronology of important events and brief biographies of important persons mentioned in Hobbes' text.