What factors convince many people to support independence

Sense, that Thomas Paine wrote, had an impact on the colonists favoring for independence more and the United States Declaration told people that they should support the constitution for a better lifestyle.

It is the doctrine that the us had the right and duty to expand throughout north america. it just means they believed they had the right to expand westward and they did! they stated with the 13 colonies and then they kept moving gaining different territories throughout the years