"Utopia" is a work of political philosophy and speculative fiction written by Sir Thomas More and first published in 1516. The book is set in the fictional island of Utopia and is presented as a dialogue between More himself and Raphael Hythloday, a traveler who claims to have visited the island.

In "Utopia," More and Hythloday discuss various aspects of Utopian society, including its political organization, social structure, economy, and customs. The island of Utopia is depicted as an ideal society characterized by communal ownership of property, religious tolerance, and a focus on education and the common good.

One of the most famous aspects of Utopian society is its abolition of private property and money, with goods being produced and distributed according to need rather than profit. The Utopians also practice religious tolerance and hold freedom of conscience in high regard, allowing individuals to worship as they please.

However, "Utopia" is also a work of social critique, with More using the fictional island as a means to comment on the shortcomings of European society in his own time. Through the character of Hythloday, More explores issues such as the corruption of government, the inequities of the class system, and the injustices of war and colonization.

"Utopia" has had a significant influence on political and philosophical thought since its publication, inspiring countless other works of literature, as well as movements for social reform and utopian experimentation. The term "utopia" itself has come to signify any idealized or imaginary society, and More's book remains a classic of speculative fiction and political theory.