People
The Rise of the Kush affected different people including the Egyptians, Rome, and Assyrians. The Egyptians were the most affected by the Kushites. The Egyptians history was actually in certain dynasties centered around Kush like the 25th dynasty of Egypt was the Black Pharaoh dynasty which meant that Egypt really wouldn't have developed with Kush. Rome was not that impacted by Kush. Kush was really it's one of many suppliers. Assyrians were impacted probadly no as much but it was important the Assyrians actually help ush to realize the flaw of their weapons. The Assyrians had iron weapons when the Kush had cooper and after losing Egypt to the Assyrians the Kush modernized their weapons and converted to iron weapons.
Ideas
Ideas that I have about Kush is that they took over Egypt after it's fall not to rule but to restore it to it's original glory. Another idea I have is that Egypt thought of Kush as a very big threat and conquered them to actually self destruct them.
Events
Events that affected Kush the Assyrians coming and forcing Kush out of Egypt, the Kushites discovering gold and converting to iron, King Piye conquering Egypt and becoming a Black Pharaoh, and the fall of Lower and Upper Egypt.