Harris is a brilliant essayist and the book explores and explodes a great deal of conservatism in bioethics. His arguments are compelling. He is sort of a radical utilitarian. He thinks that we should embrace any technologies that make life go better for humanity and not to turn these things down because either we feel squeamish or it sounds too radical. He says the basic test is: does it make life better? And if that is stem cell research or intervening in evolution to make humans longer-lived or more intelligent we should go and do it.