Tobacco planters originally used slaves from Africa. Slaves were first captured by the system of slavery already set in place in Africa, and then brought to European ports on the coasts. From there, they were shipped to the New World, many dying along the journey as a result of the unsanitary ships and inhumane conditions. Once in the New World, they were bought and sold by plantation owners.
The main effect that it had on our country was that it caused the calling of the Constitutional Convention. The men who attended this convention wrote the US Constitution. Thus, Shays' Rebellion led rather directly to the writing of the Constitution