Again, you conveniently forget the important part. Before we invented writing, we were not remotely transporting as much stuff as we are today. I mean, before

Again, you conveniently forget the important part. Before we invented writing, we were not remotely transporting as much stuff as we are today. I mean, before fossil fuels, the world ran on renewables. But that's not at all a proof that we can easily go back to renewables: it was a different world then.