This review article, co-authored with Rezarta Bilali (NYU Steinhardt) and now published in Advances in Political Psychology, juxtaposes and outlines the different ways in which members of (former) victim and perpetrator groups construe the same events of collective violence, explaining the often entrenched conflicts over what happened and whether and how the events should be commemorated and redressed. For the abstract see https://onlinelibrary.wiley.com/doi/abs/10.1111/pops.12570