The first part of the subject looks at theory. It covers the history of violence and genocide and the reasons behind why they take place, specifically political, cultural, economic, and even psychological factors. Different roles are also covered - victims, perpetrators, bystanders, witnesses, and "grey-zones".
The second part of the subject is on specific case studies. The major one is (obviously) the Holocaust. Other main examples include Armenia, Indonesia, and Cambodia. Lesser known cases are covered briefly, as well as examples of mass killings which aren't fully recognised as genocides.