Key take away:
A small number of communities initiate most conflicts, with 1% of communities initiating 74% of all conflicts. The image above shows a 2-dimensional map of the various Reddit communities. The red nodes/communities in this map initiate a large amount of conflict, and we can see that these conflict intiating nodes are rare and clustered together in certain social regions. These communities attack other communities that are similar in topic but different in point of view.