Julius Henry "Groucho" Marx (; October 2, 1890 – August 19, 1977) was an American comedian, actor, writer, and singer who performed in films and vaudeville on television, radio, and the stage. He is considered one of America's greatest comedians.
Those are my principles, and if you don't like them... well, I have others.
—Susan Cain in Quiet: The Power of Introverts