Reductio ad Absurdum
According to the theorists ideal altruism doesn’t exist.
There’s genetic altruism, feelings that lead to favours exchanged between kin, and reciprocal altruism, thoughts that lead to favours exchanged between non-kin, but no ideal altruism.
Laughingly, the development of reciprocal altruism was powered by the artificial concept of expanding who was kin. Think religions and countries and you get the idea.
Ideal altruism is just a stretch target used by those attempting to increase the reach of reciprocal altruism, the basis of modern society.
Ever heard of Zeno’s Paradox? You can get closer but there ain’t ever no cigar.
There’s no way the peoples of this planet will ever consider everyone else as kin. Unless of course we get attacked by some nasty aliens.
