The FED is decentralized in its structure, but it is still a central manager of the U.S. economy. That's not full decentralization. The Quakers are much closer. Many Christian denominations are decentralized in some sense, but they are very often (as is the case with URC, it appears) exclusionary, meaning you must adhere to their special pet doctrines if you want to become a member. As a Christian, I object to that on principle as Christ is all and in all (Colossians 3:11). I'd be curious to see how decentralization is playing out in New Bethlehem. I'm guessing you mean the town in Pennsylvania.