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.
Robert A. HeinleinVictory in defeat, there is none higher. She didn't give up, Ben; she's still trying to lift that stone after it has crushed her. She's a father working while cancer eats away his insides, to bring home one more pay check. She's a twelve-year-old trying to mother her brothers and sisters because mama had to go to Heaven. She's a switchboard operator sticking to her post while smoke chokes her and fire cuts off her escape. She's all the unsung heroes who couldn't make it but never quit.
Robert A. Heinlein