Well, it 'has been a few generations since Manifest Destiny,
Still I think I get your point, that you meant adaption more in the short term, of decisions people make to a situation.
True,
But knowledge of this fact ought encourage people to be 'more leery, not less.
To take steps and measures to 'avoid destruction of culture and blood, for as long as possible.
Well, least for people who identify strongly with their people,
Myself I'd call lukewarm,
More concerned with enjoying life, than crusading ideals.