Why did slavery become an institution in the southern colonies?
It used to exist all throughout the United States. But the North wasn’t as suited for farming as the South was, and so the North turned to manufacturing and the like. This made slavery not profitable in the North. Later, slavery was abolished in many northern states, but not in the South. Slavery was useful down there, but it didn’t become really profitable until the cotton gin was invented. In the South, their entire way of life was built around slavery. That was the very reason they refused to abolish it. There were many southerners who knew it was morally wrong, but they thought that if they abolished slavery it would collapse southern economy. As it turns out, that almost happened.