Human beings are social creatures by nature. It should therefore come as no surprise that many decisions occur within the context of social groups. Whether a decision involves choosing a restaurant or which nominee a political party should support, individuals within a group often accept trade‐​offs as long as decisions are made within established rules. How do these rules develop? How do individuals determine what trade‐​offs they are willing to accept? If rules and trade‐​offs are unique to each group, how can political scientists truly understand what people want? In his book, Choosing in Groups, Professor Michael Munger of Duke University examines these dynamics and the relevance they have for understanding political institutions and politics in general.