With no mention of the evolution of empathy, compassion and altruism, (let alone no mention of George Price's work or Frans de Waal's insights), I'm unsure that you can draw the conclusion we move upwards from a zero-sum bias.
In fact it is our adaptability across a range of elements that gives us the ability to be zero-sum, -two-some, and more-some.
With no mention of the evolution of empathy, compassion and altruism, (let alone no mention of George Price's work or Frans de Waal's insights), I'm unsure that you can draw the conclusion we move upwards from a zero-sum bias.
In fact it is our adaptability across a range of elements that gives us the ability to be zero-sum, -two-some, and more-some.