Tough one.

My first reaction would be to look at it from an individual perspective. And I would have to wholeheartedly agree with GC.

But there's also an imperialistic side to it that I find it hard to reconcile myself with. 'Should we allow the child to return to that place where the life of all humans lasts less than in the city or the mans are more inclined to get ill?' You are forcing them to adopt a western way of living like this. The last remnants of tenthousand years of native American civilization are destroyed.