This really needs to be broken into 3 polls.
1. Is a Myth. Countries have grown dramatically once their culture became conducive to it.
2. Is not a myth. We see very little results for the amount of foreign aid we pay for.
3. Is a Myth, as there is a positive correlation between population and the rate of increase in quality of life. As counter-intuitive as it seems, more people means better quality of life as we have more minds working on any given problem, increasing the rate at which that problem will be solved.