This seems like it should be testable. There may be no cavemen around, but there are still uncontacted and recently-contacted tribes, as well as whole countries where life is far harder than ours. I wonder what the statistics look like for those..
This seems like it should be testable. There may be no cavemen around, but there are still uncontacted and recently-contacted tribes, as well as whole countries where life is far harder than ours. I wonder what the statistics look like for those..