Neurodegeneration vs Intergeneration: stress and epigenetics

In response to this comment on Google+

"Stanford neuroendocrinologist Robert Sapolsky is highlighted in "The Great Divide: Status and Stress"   http://inter.ec/15WBC3D


When Sapolsky says, “Early-life stress and the scar tissue that it leaves, with every passing bit of aging, gets harder and harder to reverse,” says Robert Sapolsky, a neurobiologist at Stanford. “You’re never out of luck in terms of interventions, but the longer you wait, the more work you’ve got on your hands.”
For a very long, and in depth explanation listen to "'Stress, Neurodegeneration and Individual Differences,'  but in a word, "glucocorticoids."
Stress, Neurodegeneration and Individual Differences


He might have referred to epigenetics.  "Early-life stress can extend to an infant in utero, where that lost "sense of control"  ("the stress that kills, ...characterized by a lack of a sense of control over one's fate, this “learned helplessness,” is the mother's or perhaps the grandmothers, since the effects of epigenetics is intergenerational.  The NY Times piece goes on to connect stress to poverty but it might also be linked to segregation, or the events of 9/11.
see the video, "The Ghost in the Gene."

Regarding stress in the general sense, this is an interesting TEDxTalk about the differences between "Stress" and stress.
"Acknowledging the Power of Positive Stress"
Acknowledging the Power of Positive Stress