The document discusses key aspects of federalism in the United States, including:
1) Federalism divides power between the national and state governments, with both getting power from the Constitution rather than each other.
2) The Founders adopted a federal system to balance unity and diversity in the large nation and check tyranny.
3) Over time the balance of power has shifted, from dual federalism where states and national government had distinct spheres, to cooperative federalism where powers are shared, to attempts to devolve more power to states through block grants and limiting mandates.