You’re seeing a visual representation of documented interactions between leaders and groups relevant to the French and Haitian Revolutions. These interactions can include speeches and letters. Some leaders, such as Toussaint L’ouverture, have multiple documented interactions.
Hovering over each node will allow you to see all the connections with that node. Many of these interactions can be found in J.R. Beard’s Toussaint L’Ouverture: A Biography and Autobiography and David Geggus’ The Haitian Revolution: A Documentary History.
The color of each node indicates the country affiliation of that leader or group.