Heretics is a series of essays by Gilbert Keith Chesterton. First published in 1905. It is a book about religion and politics, theory and fact, morals and efficiency.

In Heretics, Gilbert K. Chesterton rails against what he sees as wrong with society. He points out how society has gone astray and how life and spiritually could be brought back into focus. It is foolish to fight for people's disagreement in their theory of the universe, but it is even more to think that one's philosophy does not matter.

Gilbert Keith Chesterton,(29 May 1874 – 14 June 1936) better known as G. K. Chesterton, was an English writer, lay theologian, poet, philosopher, dramatist, journalist, orator, literary and art critic, biographer, and Christian apologist. Chesterton is often referred to as the "prince of paradox."He is well known for his fictional priest-detective Father Brown, and for his reasoned apologetics.