A very sad day for everyone in Europe. The EU is not only about trade regulations, but about a continent who had a not very peaceful history finally growing together. The freedom of movement for European citizens was not only "convenient" but in fact an important civil right. When you live or have a business in one state of the US, you are bound to local regulations of course, but being part of the US granted you a l…
In politics, I don't think bigger is better. I'd even say it's dangerous.
Once a political unit gets too large things get weird. There exists an optimum complexity for political units for them to function effectively or you get fragmentation.