Complex sentence: Turner also thought that revolutionary violence would serve to awaken the attitudes of whites to the reality of the inherent brutality in slave-holding, a concept similar to 20th-century philosopher Frantz Fanon's idea of "violence as purgatory".
Split into simpler sentences: Turner also thought that revolutionary violence would serve to awaken the attitudes of whites to the reality of the inherent brutality in slave-holding. This concept was developed by 20th-century philosopher Frantz Fanon in his idea of "violence as purgatory".