These colonies were established for economic reasons, primarily to produce cash crops such as sugar, tobacco, and cotton. They had similar social and political structures, with a small elite of white planters who controlled the economy and politics, and a large population of enslaved Africans who performed the labor.
The plantation colonies in the Caribbean and the American colonies also had similar relationships with Britain. They were both governed by the British government and were economically dependent on Britain for markets for their goods.