Active — read in full 2026-10-29 (NOTE-1301), in place of LIT-1697, which could not be reached; worth reading as the record's only account, at second hand, of what Tajfel et al. 1971 (LIT-1697, Unavailable) designed and found, and as a map of the critiques. Two of them bear on the owner's thesis: favouritism may come from projecting the personal self onto the group, and personal gain comes first when it is on offer.