<P> Historian William E. Weeks has noted that three key themes were usually touched upon by advocates of manifest destiny: </P> <Ul> <Li> the virtue of the American people and their institutions; </Li> <Li> the mission to spread these institutions, thereby redeeming and remaking the world in the image of the United States; </Li> <Li> the destiny under God to do this work . </Li> </Ul> <Li> the virtue of the American people and their institutions; </Li> <Li> the mission to spread these institutions, thereby redeeming and remaking the world in the image of the United States; </Li>

What was the basis for the development of the far west of the united states