It references a number of interesting social science studies showing how profoundly that time of life can shape you, damage you and predict who you will be. Some other highlights are below.

Height, weight and attractiveness during high school predict success as an adult better than those factors in general:

…it wasn’t adult height that seemed to affect their subjects’ wages; it was their height at 16. (In other words, two white men measuring five-foot-eleven can have very different earning potential in the same profession, all other demographic markers being equal, just because one of them was shorter at 16.)