For the 1000th time here and elsewhere - look no further than Switzerland. Highly diverse, federated group of people that managed to preserve most direct democracy in the world for 800 years and counting. 'Most free and most armed nation in the world' still holds true without clusterfuck that US gun situation is. Each canton is very self-sufficient, governs local rules, laws and taxation so there is no animosity between various regions - really a mini version of EU.
This is how EU parliament should look like, if (mostly) french and german egos would step down from their pedestals and acknowledge that somebody may figured things out better. Its most capitalistic country in Europe by far while preserving most of what we call social and healthcare net, has top notch free education and so on. Also its not increasing its debt, a clear mark of sustainable economical success of such approach, in contrary with literally any EU country.