Humans are great. We’re also shit about some things. We’re working on it. It remains to be seen whether we’ll get our stuff together before we wreck the planet thoroughly enough that it can’t support us in this current paradise mode, but it’s not because we are incapable. Our failures are failures of spirit, self-government and self-control, and good values, not failures of “fitness” or that this layout hasn’t been successful at getting us this far.