How did growing nationalism affect foreign and domestic policies

The major way in which growing nationalism affected foreign and domestic policies in the early 1800s in the US was that it made Americans more assertive in the sense that they felt they could claim more land, since they were acting as a "unit". This came to fruition during the Mexican-American War and the expansion of the US into the west. 

Ifound this on google “the existence of agglomeration economies is central to the explanation of how cities increase in size and population, which places the phenomenon on a larger scale. the concentration of economic activity in cities is one reason for their development and growth.” i hope this you for what your looking for.

Acapital e have password