People are interdependent, we require a team, a society, to live. You have the naked body to test this premise. Since we need a team to live, some way of judging the performance of people in society is needed, and judging the performance of society with nature.
Money is a flawed measure.
Using money, some people have far more than they need, and others do not have enough. Money prices by scarcity, and does not encourage energy efficient or sustainable actions by individuals or society with nature. Measuring the energy efficiency of actions, and the sustainability of those actions, is a rational way to judge performance of people with regard to each other and nature. It takes a village to raise a child - it should be a village decision how many children are born. The criteria for how many should be based on the balance of resources sustainably available.