Well ....I suppose the concerns of Brexit voters are mirrored in the attitudes of other Europeans as well as North Americans and it has less to to do with terrorists and economic migrants than simply being able to afford and maintain their current standard of living while being able to pass on those advantages to their children and grandchildren. Mounting government and personal debt... coupled with ever increasing losses of lucrative jobs due to artificial intelligence, automation and offshoring...in addition to an ever more rapacious civil service, more bureauacracy, higher taxes, unaffordable homes - a growing dependance on government largesse.......

It kind of sounds like the Roman empire in the decades before the collapse - just replace AI and automation with slavery. Masses of desperately poor and overly taxed people, supporting a decadent elite and too privileged civil service. Who wouldn't welcome in the barbarians ! Ha !