Sergey Gennadiyevich Nechayev ( or Nyechayev ; ) ( October 2 , 1847 -- November 21 or December 3 , 1882 ) was a Russian revolutionary associated with the Nihilist movement and known for his single-minded pursuit of revolution by any means necessary , including political violence .
Sergey Nechayev ( 2 October 1847 -- 21 November 21 or 3 December 1882 ) was a Russian revolutionary terrorist . He was a leader in the Nihilist movement and known for his single-minded pursuit of revolution by any means necessary , including murder .