Overpopulation is really not the origin of much negative bias, and where researchers publish on that topic it is to note that it isn't an issue. E.g.: http://w

Overpopulation is really not the origin of much negative bias, and where researchers publish on that topic it is to note that it isn't an issue. E.g.: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3192186/ http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3192186/ However: researchers don't want to be seen as being just another part of the "anti-aging" marketplace of pills and potions and lies, as it has a negative affect on their credibility and ability to raise funds for research. That is the dominant issue, and it has taken a lot of work over the past few decades to get even more adventurous and strong-willed researchers to the point of being willing to talk in public about extending healthy human life spans.