That's not the point. The point is, different cultures had wildly different point that they saw as "fair". Hunter-gatherers might a large share - first in, best

That's not the point. The point is, different cultures had wildly different point that they saw as "fair". Hunter-gatherers might a large share - first in, best dressed, and the loser is content with picking over the carcass. Other societies (which emphasised gift-giving) would consider a 60% offer insultingly low. Americans saw 50% as fair.