I don't want to say "to be fair" because this isnt fat sympathy, but I don't agree with this dude's hypothesis that fatness or even motivation is genetic. I don't like to consider genetics equivalent to fate, you kind of always have a choice. He may have what amounts to anecdotal evidence of his hypothesis (injecting melanin in males induces erections (I'm trying out my assonance)) but until we have studies about what chemical or biological synthesis is occurring, I don't think you can make a claim and call it purely scientific - I think that's more along the lines of confusing correlation and causation. Maybe you can control mood and behavior by using drugs to alter different hormonal and biological functions but that doesn't mean a natural variance in those elements is key to human achievement. People can take things like antidepressants and focus differently or achieve more but that doesn't mean that people who don't have to take antidepressants think in that same way as a person whose thinking is altered by those drugs - or that a person who doesn't have to take antidepressants is less likely to become sad. I mean Im kind of an asshole, and a cynic, but when you really break it down and look at it, human POTENTIAL is actually really magnificent, and to say that it's all based on genetics or some random mutation is kind of like robbing yourself. Humans, and even society, are so complex that you're doing a disservice to just go, "Oh, I've SEEN it! X does Y 100% of the time."  In fact, this article is 15 years old - I recall reading a more recent article that suggest that DNA even mutates within one's lifetime, which is an incredibly significant variable when discussing genetics.