Geographical factors contribute to the expansion of slavery because the North and South have different temperatures. Which means they could plants different plants, such as tobacco and rice. In the south (Carolina), they could plant rice and tobacco. And they are the major plants that in the triangle trade.
Technological innovations contribute to the expansion of slavery because of the cotton gin. Cotton gin is a machine that separates the cotton from the seeds. When the cotton gin came out, the owners thinks it was more efficient to produce cottons easier. So the owners relocate more slaves to another field so they can plant and reproduce more cotton to be sold in the markets. Resulting, in needing more slaves to reproduce more cottons plants. Helping the expansion of slavery in technological innovations.
Individual inventors also help slavery expand because as new inventions are invented and introduced to the owners of the fields of crops, the more slaves would be bought by the owners. Finally, entrepreneurialism helped expanded slavery because as people have new ideas, the slaves will have to do more work to carry it out.