One of the central tenets of social identity theory is that we strive for positive distinctiveness. Differentiation fosters feelings of cohesion within the in-group and exclusion toward the out-group.

The theory suggests that a group goes through Forming, Storming, Norming, Performing and Adjourning Stages. The discussion about Princess Kate echoed these normal group dynamics.

In 2003, a German graduate student named Britta Späth encountered the McKay conjecture, one of the biggest open problems in the mathematical realm known as group theory. At first her goals were ...