Why did so many sucessful empires grow on the niger river

How did the beliefs of the roman catholics differ from the eastern orthodox form of christianity?

Did the spanish settlers and missions have a positive effect on world history? why, what did they do that was positive? why was the treaty of paris (1763) good for the world/world history? did the plymouth colony have a positive effect on world history? why, what did they do that was positive?

The english document that laid the ground work for judges in the us to rule based on precedent is known as the