The railroad industry.
Explanation:
George Westinghouse was an American innovator that had huge impact on the development of the railroad industry. His most notable innovation that improved the railroad industry was the railway air break. This was extremely important, especially in the 19th century, as the trains often found themselves in a situation where a highly efficient break is needed urgently, but they didn't had such at disposal.
Many accidents have happened because of the inefficient breaks, so when Westinghouse came up with his railway air break it was seen as a savior invention which will help the railroad industry a lot when it comes to accidents, repairs, or constantly making new trains. Westinghouse put in all of his effort and finances into patenting and promoting this innovation, as well as the others he had, and it paid off for him over time.
It was right in the middle of the Bosporus, Black Sea and the Mediterranean Sea. So, all trade between North Africa, Asia and Europe, had to pass through the capital (Constantinople), causing the Byzantine Empire to become very wealthy due to taxes they charged between the trading.
Gutenberg's press and the subsequent printing and sharing of philosophical essays about the role of the Church allowed for the Reformation to spread and take root.
Prior to the printing press, a person would have to hand copy a text. The printing press made it so hundreds of copies of texts could be printed quietly and shared widely allowing people to interact with new ideas.
They were monotheistic, which means they believed in only ONE God.
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