“On the Question of Free Trade” is the Public Speech Delivered by Karl Marx before the Democratic Association of Brussels, fixed and translated by Friedrich Engels in the 1848. The main theme of the speech was the place of economic in the course of history. For some time after 1848, Marx and Engels wondered if the entire revolutionary upsurge had completely played out. At that time they began to think that a new revolutionary upsurge would not occur until there was another economic downturn. It's well-known, that Marx was one of the most influential figures in human history.