How many Africans were laboring on plantations and mines in the America by 1650?

What made the middle colonies different from new england and the southern colonies?

What are new social classes emerged due to advancement in agriculture ?

Thomas jefferson was important in the revolutionary era because a) he wrote much of the declaration of independence. b) he was elected the president of the continental congress. c) his philosophies were used in the influential pamphlet common sense. reactivate d) his leadership and moral stand lead to the colonies to fight for the abolition of slavery.