I think it has other roots, has to do, in part, with a general anxiety in contemporary life... nuclear bombs, inequality of possibility and chance, inequality of goods allotted to us, a kind of general racist, unjust attitude that is pervasive.
“We leave as we came and, god willing, as we shall return, with peace, and hope for all mankind.”
“Engineers like to solve problems. If there are no problems handily available, they will create their own problems.”