The entire history of all living things relies on a simple principle: we live in a world of limited resources. It defines how organisms evolve, how societies act, how economies change, and how governments run (or fail). We take this assumption so much for granted that if anyone refutes it, they’re considered ignorant or insane. Tell someone that one day we will have unlimited food and see their response. Civilisation as we know it is going to have the biggest shake-up yet: because this guiding principle will no longer be relevant.