You're basically reluctant to accept the fact that such a calculation is possible. That says more about you than the competence of mathematicians and ecologists...
Can you bring one claim of "mathematicians and ecologists" that their calculation would not be arbitrary?
Those things ain't absolutes and human society is not made up of numbers and not calculable. So you can make approximations. And they can be useful or not. But you cannot calculate the perfect size of a human society. That is just arbitrary.
Those things ain't absolutes and human society is not made up of numbers and not calculable. So you can make approximations. And they can be useful or not. But you cannot calculate the perfect size of a human society. That is just arbitrary.