Burnham is the father of Neoconservatism, which oddly is a heretical branch of Trotskyism created by the "Burnham-Shachtman Split" - the same event that ultimately spawned the recently important DSA.

History is bizarre.

The split in the Socialist Workers Party between the majority (Leon Trotsky, James Cannon) and the minority factions (Max Schachtman, James Burnham)

https://www.marxists.org/history/etol/document/fi/1938-1949/...

James Burnham: Letter of resignation from the Workers Party

https://www.marxists.org/history/etol/writers/burnham/1940/0...