I am very partial to open borders, but I concede there is not a practical solution yet. There is a book (I forgot the title at this time) of an economist where

I am very partial to open borders, but I concede there is not a practical solution yet. There is a book (I forgot the title at this time) of an economist where he "shows" (fwiw) how open borders could multiply the world productivity by a high factor, decreasing global inequality and other many positive effects. On the other hand there is the risk that an idyllic and safe community may be overrun but people who dont respect or adapt to the new environment. For me a (still very theoretical) situation would be: - People still keep their current nationalities - Everyone has the right to a 3-month tourist visa to any country, no question asked, unless you are a fugitive o has been banned from leaving your country for some valid reason. You can return to the country if you want, 180 days after leaving it. - If you get a job offer you have the right to a 1 year probationary working visa. You must stay for a least 6 months, but after that you can switch jobs if you want. If you are fired within the first 6 months, you still receive 6 month- 1 year permit to get a new job without having to leave the country. After the first year, you get a 2 year permit and after that you can get permanent residency if you want. - If you commit any serious crime (say, having to serve +6 months) you are immediately deported and banned forever from that country,another of that offenses and you can't leave your country of origin. - If you overstay your visa you must be also "punished" with some kind of temporary banning on your passport, heavier penalties for repeating offenders. I know this is still very naive and crude, but we need to move towards a refined system in that style. The better we improve the big inequalities we have in the world the easier will be to implement it ( I know, I know). For me it is very absurd how just because of a simple accident of where one was born it may be forbidden to visit or work in a good portion of this planet. I am optimistic in the very long term, future generations will see this situation as absurd as we see now things like serfdom,having to swear loyalty to God and King or the probably mythical prima noctis notion.