Though funds from the federal government expedited the development of roads, canals, and railways, in what way did such government intervention change the role of the federal government with reflection upon interactions between the central government and state and local governments? How has this process actually affected the manner in which the public "perceives" the "rightful" role of the federal government? Under what interpretation of the Constitution has this occurred? Though this originally was motivated by a sense of "Manifest Destiny," what are the concomitant disadvantages? What are some of the areas in the lives of individual Americans in which this intervention has extended?