 If nuclear conflict was the first morally significant social issue to be extensively analyzed using game theoretic tools, in the recent philosophical literature it has been the analysis of harmful, destructive, and wasteful norms where game theoretic tools have been most prevalent. Specifically game theoretic tools have been used to explain: 1) what bad norms are, 2) when and why they emerge, and 3) whether they can be changed, and, if so, how.