[John Jamieson]

Liberals never want to talk about the advantages of huge stresses to the enviornment. These thing are always described as disasters.

These disasters also force "survival of the fitest". Without them, earth would still a covered with much simpilier life forms. We certainly wouldn't be here. Conservatives would never have evolved.

[RightWhale]

the advantages of huge stresses to the enviornment

The survivors are probably more robust and varied than the ones that were wiped out. Eight species of trilobites isn't much to build an interesting biosphere.