Genocides have persisted around the world for centuries, yet the debate persists about what intentions and subsequent actions constitute an actual genocide. As a result, some crimes against humanity, targeted rape campaigns, and widespread displacement of marginalized groups of people around the globe have not been formally recognized as a genocide by world powers while others have. The 1948 Convention on the Prevention and Punishment of the Crime of Genocide set out to provide clarity about what constituted a genocide and the corresponding expected behaviors of nations that bear witness to it. Still, even with this United Nations document in place, there remains some debate about genocides. The United States, a superpower on the world stage, did not sign on to the Convention on the Prevention and Punishment of the Crime of Genocide until 1988 due to a belief that its participation was not necessary as a civilized world leader that had its own checks and balances. More genocides have taken place since the enactment of this 1948 legislation. Genocides that have taken place pre- and post-1948 affirm the need for nations around the world to agree to a set of behaviors that protect targeted groups of people from mass destruction and prescribe punishment for those who perpetrate such atrocities. Although it may seem that identifying genocidal behaviors toward a group of people would be clear and convincing based on witnesses and/or deaths of targeted members, history has shown this not to be the case time and time again. Perpetrators tend to deny such behaviors or claim innocence in the name of self-defense. Regardless of any acknowledgment of wrongdoing, genocides are the world’s greatest crime against humanity.