Federalism is the distribution of power between a central authority and constituent units, such as the federal government in Washington DC and the states. Article V of the constitution allows for the creation of constitutional amendments via an act of Congress, or by the application of a majority of the states. In this case, both the states and the central authority are able to make necessary changes without the consent of the other.
Hinduism grew out of Brahmanism. It became so popular because of its ability to absorb the influence of other religions and because it was generally so tolerable.
