The planet has already given you as much as it could. You cannot draw any more from it. So, we can very safely and very confidently say that for the world, in general, the future is internal growth. If economics is about welfare, then further welfare of this planet and of mankind, in general, is not going to come from GDP; it is going to come from an internal ascension.
And if that internal ascension is not being targeted and is instead being sought to be compensated by more and more external goods, then it is very unwise.