In writing this book, I hope I have offered some guidance to those-the young especially-trying to articulate their objections to our way of life. However, this is not enough. As citizens of a free society, we have a duty to look critically at our world. But if we think we know what is wrong, we must act upon that knowledge. Philosophers, it was famously observed, have hitherto only interpreted the world in various ways; the point is to change it.