" No one today can credibly claim to know how the future will turn out. I have been told that while all frogs begin their lives as tadpoles, not all tadpoles become frogs. It seems that in certain artificially controlled environments - and who will deny that our environments are increasingly artificial - some will remain tadpoles their entire lives. At this point in our cultural history we are becoming like the tadpoles of a new kind of humanity. It remains to be seen of one day we will become frogs. "

― , Juvenescence: A Cultural History of Our Age