I believe tribalism is inadequate as it implies a strong awareness or belief of the separate existence of "my group" vs "that group". The author is focused more

I believe tribalism is inadequate as it implies a strong awareness or belief of the separate existence of "my group" vs "that group". The author is focused more on those clusters which logically exist but are unknown to those inside. What he brings up is related to the subject of privilege which feminists often talk about.