Anumber of differences between two regions can result in

sectionalism

Explanation:

Sectionalism is a term used to refer to people's loyalty to just one portion or section of a country instead of being loyal to the country as a whole. These differences might cause conflicts between two regions. An example of sectionalism is the civil war in U.S. between the North and the South.

i believe it would be capitalism

a. "how old man winter was driven back” and “ormuzd and arimanes"