The first main reason was most of the market was based solely on credit, which was stock that was purchased without actual cash, but purchased on credit.
The second factor was the massive pull out by many investors due to a panic that caused the Banks to attempt to purchase these stocks leading to a complete collapse in the market.
The foundation of Jim Crow laws was that the "African Americans are culturally and intellectually inferior to white people."
False, at the end of the Third Punic war in 146BC, they re-developed as Roman Carthage which had become a major city of the Roman Empire in the province of Africa. It didn’t BECOME the province, it was a city within it.