""The North American aboriginal peoples did not have a choice of countries they could get to before lunch.""

Ummmm???

There were options (in historic phases) for Aboriginal peoples to move throughout North America, to go to areas with less opression. Those in Canada and the USA had (and now have freedom) to move from one country to the other - if they feel opressed in their home area. Yet, most tended to "stay put" - regardless of the greater or lesser opression, as it changed historically.

Also, most blacks in the USA tended to also stay past slavery, even though there were some options open.

I feel that your general statement is too broad and there are far too many confounding factors to offer much for reflection - at least beyond the local point you raised it to reinforce. It is just more complex than that. For this reason, I hold in "suspect" most general statements of a similar nature put out to make a specific point.