Generally &quot;Physical growth&quot; and &quot;GDP growth&quot; are not really similar.<p>A number can grow infinitely. Tree or human population can not.<p>GDP approximates perceived value prodced by society. In capitalism, saying GDP cannot grow anymore is essentially saying humans don&#x27;t want anything you can buy with money to be better in any perceivable way. Give average guy huge amount of money, if he burns it for shits and giggles, then GDP cannot grow anymore.