Ok, so how to calculate it for switzerland in a non arbitrary way?
(Btw. I believe switzerland is not trying to be self sufficient anyway, but donimport lots of stuff, like most other countries do)
(Btw. I believe switzerland is not trying to be self sufficient anyway, but donimport lots of stuff, like most other countries do)
Other variables to factor in would include cultural/esthetic ones: how much would a population tolerate a reduction in the idyllic/scenic nature of their landscape, merely to accommodate crops for a rising population?
(This is what I referred to as "quality of life" in another post.)
And that "how much would a population tolerate a reduction in the idyllic/scenic nature of their landscape" is a very arbitary factor that will strongly depend on who you ask.
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.