The Roman’s were very good at violating the border security of others. What killed Rome was taking the land away from the husbandmen and allowing absentee landlords to control it. Many rural people moved to cities where they were kept tame with bread(welfare) and circuses(TV, Media, etc.). We are all upset about laborers crossing the border to take little jobs, but who is raising a fuss about foreigners and our own mega-corporations buying out farmland and corporatizing production? He who fails to care for the land starves the nation.
Interesting take on it.
Not sure I disagree.