Humans are social creatures, and we are hardwired with a need to fit in. Read this Huffington Post article about how our need to fit in controls our behaviors. These ideas are a great companion to the third assignment and should shed some light on Leo's struggle with being shunned. You can read this in preparation for those discussions or share it with your students. This text has a higher degree of difficulty, so you may need to do some scaffolding based on their readiness.