 If contractarian approaches to justifying moral and political orders have been the area of ethics where the use of game theory has been most systematic, the area where its deployment is likely to be most impactful going forward is in the analysis of morally significant social issues. Examples range from global issues, like how to combat climate change; to issues that arise within states or communities, like tax policy or how to manage common pool resources; to issues that primarily concern individuals and groups, like how to elicit optimal levels of effort from individuals engaged in cooperative endeavors. Below we will discuss three examples in more detail.