I am also the product of a place called Paint Creek. Doesn't have a zip code. It's too small to be called a town along the rolling plains of Texas. We grew dryland cotton and wheat, and when I wasn't farming or attending Paint Creek Rural School, I was generally over at Troop 48 working on my Eagle Scout award.
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.
When great powers fade, as they inevitably must, it's normally for one of two reasons. Some powers exhaust themselves through overreach abroad, underinvestment at home, or a mixture of the two. This was the case for the Soviet Union. Other powers lose their privileged position with the emergence of new, stronger powers.