" That was part of the reason why my 1959 crisis was so traumatic to me: it was my first acute life crisis. By comparison, my 1980 and 2000 professional crises were un-traumatic. I did eventually switch career directions from membrane physiology to evolutionary physiology around 1980, and from physiology to geography after 2000. But those decisions weren’t painful, because I had come to assume from my previous experience that things would probably turn out OK. "

― Jared Diamond , Upheaval: Turning Points for Nations in Crisis