That's true in the 21st century, but it wasn't true for most of humanity's history. In addition, there was always a population-level competition between countri

That's true in the 21st century, but it wasn't true for most of humanity's history. In addition, there was always a population-level competition between countries (you out-breed the other guys, then conquer them by brute force). I'm not sure whether in the age of jet fighters, strike drones and nukes this competition makes sense anymore.