There's good evidence that if people are disempowered, if they have little control over their lives, if they're socially isolated or unable to participate fully in society, then there are biological effects.
Michael MarmotHealth and health inequalities tell us a great deal about the good or bad effects of social policies.
Michael MarmotAngus Deaton has written a wonderful book, The Great Escape: Health, Wealth, and the Origins of Inequality. . . . Deaton's book is a magisterial overview of health, income, and wealth from the industrial revolution to the present, taking in countries poor and rich. Not just jargon-free but equation-free, the book is written with a beautifully lucid style. . . . [P]owerfully argued and convincing.
Michael Marmot