With the ability to forge iron tools, farming tools were more effective and provided a greater production and effectiveness. More food produced means that more people are able to be fed and consequently establish and work in the land. With a higher population and food cap, West Africa settlements were able to grow.
After the Revolution, the slavery continued because the Founders had a difficulty on which one to prioritize. Their priority during that time was to break free from the British rule and to begin to work as a new nation. Slavery only ended up during the thirteenth amendment of the Constitution in the year 1835.
The Britain decided to make a economy