Watson's theory applies equally to men. He theorizes that in the distant past, a successful hunter or farmer would have a full belly and thus be content. A thin man, he says, would always be looking for his next meal. Content people have weight on them. That is why we hire thin people, because they are discontent and will work harder.
Heavier people are more mellow and less successful.
Thin people, he postulates, are so driven by the need to find that elusive happiness that they become overachievers. So worldly success may well come more easily to the slender. Quite a choice. Meanwhile, Watson says he's going to publish a paper by the end of the year on the drop in the United States crime rate.