In order to sublate the thought of private property, conceived communism is enough. In order to sublate actual private property, actual communist action is necessary. History will give rise to it, and the movement which we already know in thought to be a self-sublating one, will in actuality undergo a very difficult and protracted process. But we must look upon it as an actual advance that we have gained, at the outset, an awareness of the limits as well as the goal of this historical movement and are in a position to see beyond it.
- Karl Marx, Economic and Philosophical Manuscripts, 1844