>Seeing most everyone on Earth as ingroup improves collaboration and thus propels culture / prosperity.
Not when this isn't a shared sentiment. Whites are resented, not praised, for their anti-identity politics and inclusiveness. Now we're called racist for trying to ignore race or judging people based on the content of their character instead of the color of their skin.
Also it's a pretty radical proposition to overcome nature regarding in-group preferences, since that has a genetic component.
The "you're my ingroup by default" approach works best when reciprocated. It still works tolerably well when not, as long as overt hostility is met with an adequate reaction.
Otherwise it still works with those who agree to collaborate, and ends up in a disappointment with those who don't. (Moral panic that can grow or not from such a disappointment is another issue.)
Not when this isn't a shared sentiment. Whites are resented, not praised, for their anti-identity politics and inclusiveness. Now we're called racist for trying to ignore race or judging people based on the content of their character instead of the color of their skin.
Also it's a pretty radical proposition to overcome nature regarding in-group preferences, since that has a genetic component.