“Evolution is the law of policies: Darwin said it, Socrates endorsed it, Cuvier proved it and established it for all time in his paper on 'The Survival of the Fittest.' These are illustrious names, this is a mighty doctrine: nothing can ever remove it from its firm base, nothing dissolve it, but evolution.”

American writer, humorist, and essayist

Mark Twain was the pen name of Samuel Langhorne Clemens, an American writer, humorist, and essayist. He is best known for the novels The Adventures of Tom Sawyer and Adventures of Huckleberry Finn, and for a body of work that helped define American writing in the late 19th century. His books also include A Connecticut Yankee in King Arthur's Court and Pudd'nhead Wilson. He co-wrote The Gilded Age: A Tale of Today with Charles Dudley Warner. Twain's work is marked by wit, social satire, and a sharp eye for American life.