#Immigration
Most of them were before recorded history, and they didn't count countries, only kings. It is only about the last 500 years or less that anybody considered a nation to be a physical area of ground. Before that, a nation was like "over here" versus "over there".
Taco Truck Land
All of them were I guess but when I was in high school the right answers to that question were Argentina Australia Brazil Canada New Zealand USA and Uruguay.
All of them. But a very good example is USA