The summary of evolutionary spite is this: in a physics world of limited resources, it is rational and adaptive for an actor to kill/sabotage/harm the 50% of the world population negatively related to him/her, ceteris paribus. This is not a minor theoretical point, but fundamental to the standard utility function as stochastics or the dimension of time.

See for instance the key article below or search the literature databases for "evolutionary spite":

Hamilton, William D. 1970. Selfish and spiteful behaviour in an evolutionary model. Nature 228: 1218–1220.

I'm not writing these English-language posts without reason: but what appears to be an obscure concept in evolutionary game theory is applied by the United States government to contain and geopolitically sabotage other countries. The U.S. leadership understands this theory, applies to contain and destroy geopolitical competitors, and will continue to apply in world affairs: you have been forewarned; I will not write again on this particular subject again on pinggu.

Here is a three-part post of mine concerning perhaps the most pernicious example of evolutionary spite in history, demographic sabotage:
http://www.pinggu.org/bbs/thread-765557-1-1.html
http://www.pinggu.org/bbs/thread-765628-1-1.html
http://www.pinggu.org/bbs/thread-765688-1-1.html