How does earth’s rotation affect the paths of surface currents?

Political rights for women grew most rapidly on the western frontier primarily because (1) the settlers were influenced by native american indian societies (2) women greatly outnumbered men in the west (3) pioneer life often required men and women to share responsibilities equally (4) immigrants settling in the west brought ideals of gender equality from europe

This was an order issued during the civil war by president lincoln ending slavery in the confederate states

What is the name for the main idea behind the settling of western lands by americans in the early-1800s?