Bertrand Russell,
The Practice and Theory of Bolshevism…
(1920)
“ These four passions--acquisitiveness, vanity, rivalry, and love of power--are, after the basic instincts, the prime movers of almost all that happens in politics. Their operation is intensified and regularized by herd instinct. But herd instinct, by its very nature, cannot be a prime mover, since it merely causes the herd to act in unison, without determining what the united action is to be. Among men, as among other gregarious animals, the united action, in any given circumstances, is determined partly by the common passions of the herd, partly by imitation of leaders. ”
