Well, Karl Marx taught in his lectures that society lives in a constant state of conflict, which it is happening because the working class discovered that the means of production are being held by a small group of people, the capitalists. These were the owners of factories, farms, properties in general, forcing the worker to accept the work conditions offered to him, or no work at all, knowing the fact that other person would take the job, maybe for less pay.
Finally, the workers began the Luddite movement, with an act of protest, destroying the machines and manufactures of their workplace, along with many others actions, looking for accomplish better work conditions, workers rights and guarantees, and some others, more radicals, claimed for a entire system transformation, one that gives the working class entire control of the capital goods.
" In bourgeois society, therefore, the past dominates the present; in Communist society, the present dominates the past. In bourgeois society capital is independent and has individuality, while the living person is dependent and has no individuality." Communist Manifesto (1848)