This is wrong. By this logic the planet could support infinite people, which is clearly impossible. > The planet doesn't have to do the work. We make our own f

This is wrong. By this logic the planet could support infinite people, which is clearly impossible. > The planet doesn't have to do the work. We make our own food. We don't just conjure food from the ether, it requires space and resources, both of which are finite. We're already using half of the world's habitable land for farming, and we need to retain some wild spaces to perform all of the ecological functions that farmland can't. There's a limited amount of fresh water, etc. And food isn't the only bottleneck. If the current population all lived a modern western lifestyle, we'd be emitting an even more unsustainable amount of carbon. The planet is a closed, finite system, so by definition there must be some upper limit to what it can support.