Butler's first major success, the utopian satire "Erewhon" (1872), imagined a civilization that punishes illness as crime and views machines as potential evolutionary threats; a sequel, "Erewhon Revisited," appeared in 1901. His masterpiece, "The Way of All Flesh," published posthumously in 1903, is a semi-autobiographical novel attacking Victorian family life, education, and religious convention, and it remains a landmark of English realism.
Butler also wrote extensively on evolutionary theory, challenging orthodox Darwinism in works such as "Life and Habit" (1878) and "Evolution, Old and New" (1879). In addition, he produced prose translations of Homer's "Iliad" and "Odyssey." Though largely neglected during his lifetime, Butler profoundly influenced later writers including George Bernard Shaw and E. M. Forster, and is now celebrated as a pioneering satirist of Victorian society.