Developed nations feel superior to less developed ones and take pride in beating other countries. Older persons and parents feel superior to youth. Owners and bosses feel superior to workers. Urban dwellers feel superior to persons who live on farms or ranches. The religious feel superior to other religions and non-believers.
Women often feel superior to men in terms of morals.
Maybe we all strive for some sense of superiority, as Adler suggested. Perhaps this is because we all feel inferior in some ways. Maybe we just grab on to a feeling of superiority whenever we can because it feels good. Early developmental differences between boys and girls Gender prejudice and discrimination results, I assume, from boys and men feeling they are superior to girls and women. We don't know but some interesting things are known.