<human>:  Who is the author of the book ‘The Seven Deadly Sins’?
<bot>: The book “The Seven Deadly Sins” was written by John Stuart Mill. Mill is a British philosopher, economist, and political theorist. He was also a key figure in the development of utilitarianism, the ethical theory that says an action is morally right if it maximizes utility, or happiness, for the greatest number of people. Mill was a proponent of liberty and individual rights, and he is often referred to as the father of modern liberalism.