Friedrich Engels: With Hegel, evil is the form in which the motive force of historical development presents itself. This contains the twofold meaning that, on the one hand, each new advance necessarily appears as a sacrilege against things hallowed, as a rebellion against condition, though old and moribund, yet sanctified by custom; and that, on the other hand, it is precisely the wicked passions of man — greed and lust for power — which, since the emergence of class antagonisms, serve as levers of historical development — a fact of which the history of feudalism and of the bourgeoisie, for example, constitutes a single continual proof. https://wordsmith.social/protestation/quotes#quote3759