In what ways did colonial America change over time from a "society with slaves" to a "slave society"? What is the real difference between these two concepts? And what were the key factors in this process?

In the colonial enterprise, Slavery was a part of the parcel of a system designed to benefit the colonizer from the colony. In the absence of the colonizer it became the question of one citizen benefiting at the expense of another.

Explanation:

Colonial USA was a plantation based colony as it had some of the most fertile land in the world where predominantly commercial crops were grown.

These crops were being grown by labor that needed no jobs and no salaries and could be kept in subhuman conditions.

As the slaves produced children, they even gave way to newer bonded labors.

Hence the institution of slavery was carried out for profits in the largely agrarian economy and the American society turned into a slave society. Slavery was the backbone of agriculture of Americas at the time.