„You know that the institutions, mores, and traditions of various countries must be taken into consideration, and we do not deny that there are countries -- such as America, England, and if I were more familiar with your institutions, I would perhaps also add Holland -- where the workers can attain their goal by peaceful means. This being the case, we must also recognize the fact that in most countries on the Continent the lever of our revolution must be force; it is force to which we must some day appeal in order to erect the rule of labor.”, za: Karol Marks: La Liberté Speech. 1872.