Mean or selfish?

Doesn't seem like a wise way to live life, at least on this planet -

http://www.cbc.ca/news/technology/story/2013/08/02/science-evolution-selfish-mean.html

"A 2012 study said that the method that helped one party "win” against the less selfish, co-operative one was called “zero-determinant” (ZD). That concept led Adami and Hintze to ask questions about how effective the ZD actually was.

To test their theory they used high-powered computers with thousands of games, eventually concluding that ZD strategies were ineffective if both players were using them."