>I wonder if there's any evidence that we can sustainably support 8 billion people.
it depends on the type of lifestyle you're willing to have and how much % of the GDP you're willing to pour into it. I'm sure you can sustainably feed all 8 billion people if we poured 50% of our GDP into food production and we only ate rice and beans.
"it depends on the type of lifestyle you're willing to have"
Not just oneself, but entire nations. Scarcity of resources have historically been a major cause of wars. I don't see the world coming to a consensus on lifestyle any time soon.
it depends on the type of lifestyle you're willing to have and how much % of the GDP you're willing to pour into it. I'm sure you can sustainably feed all 8 billion people if we poured 50% of our GDP into food production and we only ate rice and beans.