As several other comments here have pointed out, it's possible for neither bad outcome to happen. Human beings always have frailties and make mistakes, and even take advantage of one another, but the long-term trend line in human society suggests the worries in the submitted article are overblown. By coincidence, the Why Evolution Is True website today has a post that responds to worries like this with actual research by careful scientists who know human nature well.

http://whyevolutionistrue.wordpress.com/2012/10/03/things-ar...

The Hans Rosling video linked to from that post is familiar to some participants on Hacker News; if you haven't seen it yet, it is well worth a look.