"[W]hen does regulating a person’s habits in the name of good health become our moral and social duty?"

Asks David B. Agus, a USC medicine and engineering professor, in an op-ed that's #1 on the NYT "most emailed" list:

The answer, I suggest, is a two-parter: first, when the scientific data clearly and overwhelmingly demonstrate that one behavior or another can substantially reduce — or, conversely, raise — a person’s risk of disease; and second, when all of us are stuck paying for one another’s medical bills (which is what we do now, by way of Medicare, Medicaid and other taxpayer-financed health care programs).

Get ready. It's coming.