What limited the powers of the federal government under the articles of confederation?

Why is james madison significant in regards to the bill of rights?

If the imperial dynasty had continued to rule china, it is most likely that a) the economy would have improved rather than weakened b) european nations would have gotten more of a foothold in china c) revolutionary groups would not have gained any power in the country d) communism would not have received support among the poor

How did mesopotamia become a center of trade