The primary responsibility of the judicial branch is to interpret and apply the laws and ensure their constitutionality.
The three branches of government share responsibility for the legal system. The Legislative branch (Congress) creates law; the Judicial branch determines their constitutionality and resolves disputes; and the Executive branch enforces the laws.
The purpose of the Constitution's 7 articles is to establish the branches of the Federal Government and describe what powers they have.
The rivers led to fertile soil and protection for people in the area so it was a prime place for settlement. Example; Egypt and the Nile.