https://wiki.lesswrong.com/wiki/Paperclip_maximizer
http://www.decisionproblem.com/paperclips/
Other articles that help really grok the general idea:
https://www.lesswrong.com/posts/HFyWNBnDNEDsDNLrZ/the-true-p...
https://www.lesswrong.com/posts/mMBTPTjRbsrqbSkZE/sorting-pe...
https://wiki.lesswrong.com/wiki/Paperclip_maximizer