So we used to be, shall we say, somewhat more cooperative as a species.

So we used to be, shall we say, somewhat more cooperative as a species. Now we can't even get along with fellow humans. Hmm...
Actually though it's a serious study; I'd much rather see some humor if you please...
Please ?

Originally shared by Stefani Banerian
http://www.nature.com/news/mystery-humans-spiced-up-ancients-rampant-sex-lives-1.14196