Which part of the english colonies was especially active in shipping enslaved africans to america?

The first African-Americans brought into English America do not do so as slaves, but as registered laborers, but in 1650 it is almost impossible for them to obtain freedom: Europeans need cheap and submissive people in the colonies, which causes settlers to be inclined to slavery. In Maryland, Delaware, and Virginia slavery is legalized first. North, New England does not need to have slaves for its traditional and puritan way of life, Nor the intermediate zone formed by New York, Pennsylvania, Delaware, New Jersey, with population of English, German and Dutch merchants and farmers, less racist and more tolerant. But in the South it was different, in the Virginias, the Carolinas, Maryland, Georgia, plantations and landowners needed massive numbers of people, leading to a system of slave control, and an accepted racist ideology.

Of the revolutions of 1848.