Byzantium/Constantinople was conquered in 1451, but the empire continued to decline starting around the 18th or 19th centuries. It officially died in WWI. As for how long it was a major threat to Europe, the empire's prime was the 16th century, under Suleiman the Magnificent.
Answer:
Sergei Witte
Explanation:
Sergei Witte is generally considered the one who kickstarted the beginning of the Russian industrialization efforts, convincing Nicholas II to do so. Despite this, working conditions were horrible, and numerous strikes commenced. One would eventually lead to the 1905 russian revolution
What's the context?
The industrial revolution
Even further back...
The agricultural revolution
Trade?
Communication?
Travel?
Exploration?
Answer:
I believe the answer is because it didn't have enough money.
