Since America is all about freedom and rights, other countries may look at that and see that America is a good country. In my opinion, America has pretty decent laws and a fine voting system. Others will see that as well.
I think I wouldn't have been attracted because I probably would already have had my business settled and been making my profits. Whereas if I had gone to the west then I would have had to start over. I think the majority of people who went to the west were people who were money seekers and who were looking to better their lives.
It was within the rights of the people and a necessity to, overthrow their government if it became too tyrannical or the system was too weak to handle crises.
The more crops there are, that means that there's gonna be more resources. Which will mean that more people will be able to live in a town, because if there are less resources and less crops then more people will starve and die out way before they can reproduce. If they cant keep reproducing and be able to feed their children, then the town will become smaller and smaller until its completely vanished.