cjpaloma, 
take a planetary paradise and
Socialize a group to believe that to be "superior" in the world they need to amass as many little pieces of paper as possible.
get them to believe that emotional sensitivity is "not important", that logic (and violence applied as necessary) will work fine, instead.
Watch them invade and oppress and create social hierarchies based on physical size and ability to overpower others
In a few generations, a few true believers WILL crash the entire planet.