Economic determinism is a socioeconomic theory that economic relationships (such as being an owner or capitalist or being a worker or proletarian) are the foundation upon which all other societal and political arrangements in society are based. The theory stresses that societies are divided into competing economic classes whose relative political power is determined by the nature of the economic system. In the writing of American history the term is associated with historian Charles A. Beard (1874–1948), who was not a Marxist but who emphasized the long-term political contest between bankers and business interest on the one hand, and agrarian interests on the other. According to Marx, each social mode of production produces the material conditions of its reproduction. Otherwise said, it is the ideology that is responsible for grounding secondary civil services such as politics, legislature, and even culture to an extent. Roughly speaking, ideology is the guiding influence of the mode of production, and without it, difficulties would theoretically arise with reproduction. Marx did not believe that the same economic rules governed all of history, but that each new era brought with it new economic factors. Furthermore, Marx and Engels are said to have believed, should a revolutionary force change the mode of production, the dominant class will immediately set out to create a new society to protect this new economic order. In the modernity of their era, Marx and Engels felt the propertied class had essentially accomplished the establishment of a new societal and economic order, instinctively creating a society protective of their capitalist interests. They made this statement to the Bourgeoisie in the Communist Manifesto: "Your very ideas are but the outgrowth of conditions of your bourgeois production and bourgeois property, just as your jurisprudence is but the will of your class, made into law for all, a will whose essential character and direction are determined by the economic conditions of the existence of your class.