"Leviathan" is a philosophical work written by Thomas Hobbes in 1651. It explores the structure of society and legitimate government, arguing for a strong central authority to prevent chaos and conflict. Hobbes uses the metaphor of a leviathan, a sea monster, to represent the state, which he believes is necessary to maintain order and protect individuals. In the book, Hobbes discusses the concept of the social contract, where individuals consent to surrender some freedoms to a sovereign power in exchange for security and peace. This foundational text has significantly influenced political theory and discussions about the nature of authority and governance.