Are we undermining our own evolution?
russell: I think not.  Darwin had a second theory of evolution by sexual selection, and it may be the more important.  It's selection, not by the jungle, tooth and claw, but intraspecies mate selection.  I think a lot of human activity is driven, directly or indirectly, by mate selection: Wall Street Money, superstars, Nobel prizes, boring jobs in IT.  I have read reports that human evolution has its afterburners on.  Curing disease and helping the less able is irrelevant, because it's overshadowed by all the other competition going on.  A century ago, the pool of potential mates was limited by your home town or county.  Now you have college, world wide travel, and the internet.