In my opinion, it was because the agricultural revolution mainly.
President Lincoln was assassinated at the Ford Theatre :)
The colonist who wanted the king to stay in charge were called Loyalists. After the revolutionary war they were kicked of the thirteen colonies and went to canada.
It <span>opened up settlement in the western </span><span>United States (people could now go settle in the west with the Indians! fun! bet no one will get hurt!) Approximately 1500 homestead claims had been established. Also freed slaves could claim land in the west as well. </span>
