At the LEAP Institute, they teach mental-health professionals and family members how to build enough trust with the mentally ill person that he will follow advice even if he won't admit to being sick.
The actions of both the young man and the teenage mother are "cultural," he suggests, because they follow from the individual's perceptions of how society works.
Here, the evolutionary theory must defer to a theory based on an explicit developmental mechanism that can favor either right-handedness or left-handedness.