LTB: Analyze how mass migration/immigration transformed both urban (Growing Industrial Cities) and rural areas (Western Frontier) causing dramatic social change.

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.

The fact that farmers were paid for destroying crops.