Leviathan is a political philosophy book written by Thomas Hobbes in 1651. It is considered a classic of political thought and is widely read and studied for its analysis of the nature of power, government, and society. The book presents a vision of society in which individuals give up some of their rights to a sovereign power in order to ensure the security and protection of all. Hobbes argues that the state of nature, where individuals live in a constant state of fear and insecurity, is the main reason why individuals willingly give up their rights to a sovereign. He also argues that the sovereign should have absolute power to maintain order and prevent civil war.

The book is also notable for its influence on the field of political science and its impact on the development of modern political thought. It is widely considered as one of the most important works in the history of political philosophy, and it continues to be studied for its insights on human nature, the origins of government and the nature of political power.