After Growth, Economic Maturity?

1. More exponential physical growth of industrial humanity can't fit on our finite planet – we already use more than earth can sustainably provide by about half.
2. Economic growth with physical growth won't fit on our one earth.
3. Economic growth without physical growth is a mirage. It is just inflation, a zero-sum game that may alter the score but can't make the system better overall.
4. In organisms growth often precedes or leads to maturity. 
5. Economic maturity remains conceptually underexplored. 
6. What guidelines would well manage economic maturity?