I want to know the answer to the following question:
What writer joined Jonassohn in the study of the whole of human history?
All the background I'm provided with is that "Jonassohn and Björnson are critical of some of these studies, arguing that they are too expansive, and conclude that the academic discipline of genocide studies is too young to have a canon of work on which to build an academic paradigm.". Is that enough to answer the question?