Michael Shermer said this quote
“ Rather than there being two distinct and unambiguous categories ofconstrained and unconstrained (or tragic and utopian) visions of humannature, I think there is just one vision with a sliding scale. Let’s call this theRealistic Vision. If you believe that human nature is partly constrained inall respects—morally, physically, and intellectually—then you hold aRealistic Vision of human nature. ”