i read a fascinating piece of fiction called "plague of angels" by sherri tepper (
http://www.amazon.com/exec/obidos/tg...glance&s=books ).
one of the central ideas of the book is a future society who believes it is their manifest destiny to dominate and control nature. they have a process in place for the re-engineering of planets away from their "natural" state into a more "human-friendly" paved and built up state.
tepper is a bit preachy, but it paints of fascinating picture of "what if..." we followed the thinking you recommend to its natural conclusion, k-man.