Does this look like a correct time line ?

He u.s. constitution (1787) establishes a national legislature with powers to “create national law”, a national executive with the power to “enforce national law”, and a national judiciary branch with the power to “interpret national and state policies” to see whether or not they violate the national constitution. this term describes the division of governmental authority into semi-independent bodies?

What happened as agriculture became entrenched in the south ?

As a result of the germanic tribes sacking rome