-The increase of immigrants
-The aftermaths of WWI
I really don't know if what I said is correct, but I just thought of it as of what happened before 1920
The headright system
The headright system caused an increasing difference between wealthy landowners and worker in Jamestown. The headright system was originally created in 1618 in Jamestown, Virginia. It was applied as a way to attract new settlers to the region and address the labor shortage, with the rise of tobacco farming, a large supply of workers was wanted, and as more people came into the region, it later increased tensions between Native Americans and colonists, enslaved servants were granted lands, which was near the natives, this migration produced conflict between the natives and the enslaved servants.
The headright system also resulted in the wealthy becoming wealthier with no benefit to the laborers.
It stated that a slave would count for only three fifths of a person in congress