Nationality after an event

[rburnsrich]

If after an event government fell, mass decrease in population say 70 percent, all infrastructure stopped. would you still be British? Would it matter? What would it mean? Your biggest enemy is unlikely to be French but is more likely to be British. Would over time new nations be formed with different boundaries? Would being British , American etc be lost for ever? It seems unlikely that a country could ever be put back together again in the same form.