More railroads lead to lesser land for crop cultivation and raising of livestock! hence, farmers are unable to earn profit from their activities.
Thomas Jefferson
Explanation:
Answer:
They weren't treated like humans, but more as a commodity, something that can be used and abused without care. In the North, people were against slavery and working to end it, so naturally, you'd go somewhere safer, where you're actually seen as a human being with feelings and unalienable rights.
It could be stated some of this was due to the start of the 2nd world war, but one of the bigger parts would be the smuggling of alcohol on the black market and the large amount of different religions, currently flooding in in such a large wave.
Maurya Empire and Gupta Empire are the most significant but there has been more than that.
Hope this helps!