I think the answer to this question is mountains
The goals were to establish governments for their new territories gained after the war to encourage peace between colonists and remaining Indians tribes and to keep colonists confined to the coasts for purposes of easier taxation and trade with the mother country.
The teacher gives a link so you can watch the video again. I know of Jared Diamond from his books. I have not seen this video before & would need to watch it too in order to help you.
