While I agree that there are details that would need to be worked out, it’s not as impossible as you’re making it sound.

I’m sure the existing tribes have some form of leadership. Put them in a room together and have them work it out.

I disagree that others groups need to be addressed at the same time. Let’s focus on fixing one issue on its own instead of trying to fix every issue at once. That’s scope creep, and it’s never a good thing.

Lastly, your example of teams being named “Asians” or “Europeans” is not the same, else we would have those names.