The reason why rice farming promoted the spread of slavery is that rice-growing required many workers to labor in unpleasant conditions, and this was one reason why rice-farming helped promote the spread of slavery. With the expansion of agriculture, African black slaves became a more important key factor for English colonists. The slaves were treated as real estate making them a precious commodity to a rice plantation owner’s estate.
The anti-imperialists opposed the expansion because they believed imperialism violated the credo of republicanism, especially the need for "consent of the governed". ... We hold that the policy known as imperialism is hostile to liberty and tends toward militarism, an evil from which it has been our glory to be free.
