There are hidden contradictions in the minds of people who "love Nature" while
deploring the "artificialities" with which "Man has spoiled 'Nature'". The
obvious contradiction lies in their choice of words, which imply that Man and
his artifacts are not part of "Nature" - but beavers and their dams are. But the
contradictions go deeper than this prima-facie absurdity. In declaring his love
for a beaver dam (erected by beavers for beavers' purposes) and his hatred for
dams erected by men (for the purposes of men) the "Naturist" reveals his hatred
for his own race - i.e., his own self-hatred.
Robert Heinlein, "Time Enough For Love"