Which of these terms best describes Karl Marx

Karl Marx is considered as one of the most forceful and influential thinkers of all time. He claims that capitalism is a class conflict of wealth wherein those who holds power keep the working people poorer. He is a Russian who changed the Russian history. "Religion is the opium of the people" is his famous quote which means "false consciousness" wherein people are kept ignorant of their position as it explains politics in the society where they belong. Karl Marx is the reason for the feud of cold war ideologies.