Bill McKibben has a new book called Falter: Has the Human Game Begun to Play Itself Out? In an interview with the Intercept, he expresses a lot of concern about climate change. Another interesting thing he talks about is the idea that genetic technology could mean that an individual human could become obsolete for the first time.

As things stand, these technologies will take the economic inequality presently in existence and encode it in our genes. This is so obviously going to happen if we continue down this path that no one bothers to argue otherwise. Lee Silver, a professor at Princeton University who is one of the leading proponents of genetic modification, has already said that in the future we will have two unequal classes of human beings: “GenRich” and “naturals.” He and many others have already begun taking such a future as granted.