Sentence:  You can never tell to what length of devilry men will go when, setting out to see justice done, they give rein to the spirit of vindictiveness and are bent only on revenge and reprisals. The results may be terrible when the Simeons and Levis of society take law and justice into their own hands. Often it has worked out into grossest inhumanity and vilest <WSD>bolshevism</WSD>. 
Meaning of the word marked with <WSD> tags:  The Communist political ideology adopted by the Russian Soviet Federative Socialist Republic and the Union of Soviet Socialist Republics; Marxism-Leninism.