There is no sustainable growth without sustainable decay. Makes you wonder about those financial systems based on economies with compounded interest -- exponent

There is no sustainable growth without sustainable decay. Makes you wonder about those financial systems based on economies with compounded interest -- exponential growth -- which are supposed to be resident on a finite planet. The population bomb is kinda heading the other direction though. People moved to cities, where kids were a liability instead of an asset, life was exciting, and women had opportunities. Now birth rates in modernized countries are below the replacement rate (which causes exponential decay as impactful as exponential growth), which is largely made up through immigration. In the limit case, birth rates in modernized countries are close to zero, and the entire population is comprised of newcomers from the places that are above the replacement rate. These countries could places for opportunity, not familyeither be like companies (where people work and live much of their lives but don't replenish themselves), or they could be like retirement homes.