The ruling in the Supreme Court case of Marbury v Madison enhanced the system of checks and balances. The writers of the Constitution were very concerned that the government would have too much power. They wanted the government to have enough power to run the country, but not to have too much power where that power could be abused. Thus, they developed two provisions that limited the government’s power. One provision, called separation of powers, gave each branch of government a different job to do. No branch could do everything by itself. The other provision, called checks and balances, allowed the branches to control each other. One way the courts can control Congress is by declaring laws illegal or unconstitutional. One of the main points in the decision in this court case is that it is acceptable for the Supreme Court to review laws to determine if they are unconstitutional. This power, called judicial review, was reinforced by the Supreme Court’s decision in this case.