I think we're talking about developing nations (not developed nations) on this issue, but regardless, it's beside the point. But, yes, if all nations start heading the way developed nations have then it won't be an issue. However, some countries, like India, for example, have exploded population-wise in the past 25 years or so, which is why Gates focused on the issue. But, fortunately, India's growth has also slowed substantially lately.