How do you think different parts of the West were shaped by the people who moved there?

Through cultural diffusion.

Explanation:

Western settlement was created by the people with different backgrounds. When this people come to an inhabited region and created a settlement, they will most likely be interacting with people from different cultures/ethnicity.

When this happen, these people start to learn about each other and took out some cultural value that they have to form a new one that derived from the combination of different cultures. This process is what referred to as cultural diffusions.

Series of cultural diffusions eventually what shaped the civilizations on western hemisphere.