Southern slave owners constantly agitated in the 1850s for state centralization of economic activities that would promote slave agriculture: state-sponsored agricultural surveys, state-subsidized agricultural periodicals, and state investment in railroads (at more than twice the rate of Northern state assistance) which would unite the South and the West and encourage more intensive cotton cultivation. They were, as historian John Majewski remarks, the forerunners of the "southern Progressives of the early twentieth century."