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…
The problem is that the EU countries have a long history of fighting against each other and their cultural differences are too big to keep them together. There isn't the sentimental feeling of America in the EU, people don't feel themselves as European and since the current situation in EU is bad, the feeling of being independent has grown a lot.
I think the problem with EU is primarily one of communication. The member states should do more to inform the public of what is going on in the EU, and EU should do more to avoid negotiations behind closed doors (because how can you ever trust a process like that?).