History, according to Karl Marx, is economics in action—the contest, among individuals, groups, classes, and states, for food, fuel, materials, and economic power. Political forms, religious institutions, cultural creations, are all rooted in economic realities. So the Industrial Revolution brought with it democracy, feminism, birth control, socialism, the decline of religion, the loosening of morals, the liberation of literature from dependence upon aristocratic patronage, the replacement of romanticism by realism in fiction—and the economic interpretation of history.