Crucial to understanding federalism in modern day America is the concept of mobility, or 'the ability to vote with your feet.' If you don't support the death penalty and citizens packing a pistol - don't come to Texas. If you don't like medicinal marijuana and gay marriage, don't move to California.
The combination of Federalism and Republicanism which formed the substance of the system, did not constitute a progressive and formative political principle, but it pointed in the direction of a constructive formula.
Federalism should be a meeting point of all groups.
The interest which lay behind Federalism was that of well-to-do citizens in a stable political and social order, and this interest aroused them to favor and to seek some form of political organization which was capable of protecting their property and promoting its interest.
Whenever a Kurd wants to measure the depth of some foreign leader's commitment to Kurdish autonomy, he listens for one particular word. That word is 'federal.' Anyone who will say he favors Kurdish federalism can be counted a friend of the Kurds.
So far I, at least, have no fault to find with implications of Hamilton's Federalism, but unfortunately his policy was in certain other respects tainted with a more doubtful tendency.
Federalism should be able to maintain unity among all. But this does not mean that we should boycott regional voices and the voices of ethnic groups.