By 1850, in the largest northern cities such as New York and Boston, immigrants made up a large part of the population. new resi
dents found it easy to assimilate into American culture. neighborhoods were emptying as people moved to the country. transportation could not keep up with the demands of industrialization.
They believed that all countries should have equal trading rights,they also believed that they secure the right to build a canal through central america, and that their navy was strong.
