Comment: Re:Manufacturing does NOT fuel jobs (Score 1) 427
An economy doesn't "grow" in any sense unless outside wealth is coming in in some form.
Economies are positive sum, not zero sum. They can grow without any outside trade. Your description is incorrect. For example, your description would imply that it is impossible for the World Economy to grow, because there is not outside wealth coming in from aliens.
Here is a nice sum of positive, zero, and negative sum in the context of economics. http://www.conceptualmath.org/philo/econ_sum.html
Here is a more detailed example of positive-sum trade between 2 parties (Crusoe and Friday) on a desert island. http://ingrimayne.com/econ/International/Comparative.html