The law changes because people were disagree about it and there's big difference from now
A stock exchange occurs in a centralized location, think Wall Street and the Stock Market. An over-the-counter market does not. Over-the-counter markets are considered less formal compared to exchanges. OTCs are less transparent and operate on fewer rules than exchanges. This can be both good and bad for those involved.
Answer: its geography
Jared Diamond’s theory consists of his belief that geography had a crucial effect and a bigger influence in the world and their economies than any other factor like beliefs and government.
According to him, Europeans became accidental conquerors because of its geography.