It is certainly possible that there are ways to improve the situation of more than one person, given that non-zero-sum games exist. The problem, as noted by Elinor Ostrom in her analysis of the governance of the commons (Ostrom 1990, ch 5), is that increasing social complexity (e.g. bringing more agents with different preferences into the game) makes alignment between players less and less likely.
It is certainly possible that there are ways to improve the situation of more than one person, given that non-zero-sum games exist. The problem, as noted by Elinor Ostrom in her analysis of the governance of the commons (Ostrom 1990, ch 5), is that increasing social complexity (e.g. bringing more agents with different preferences into the game) makes alignment between players less and less likely.