I have reported on several studies today that look at the relationship between socio-economics and health. High levels of education appear to protect against heart failure; high levels of wealth are associated with better health. No surprises there. I was introduced to social determinants of health in a graduate seminar course; epidemiologists have been noting the link between low income and poor health for some time. During the class, we speculated on relevant factors (noting that most of us were "low-income"). We came up with environment - damp homes, for instance - and behaviours such as smoking and poor nutrition. Then I did a literature review on the link between unsafe neighbourhoods and mental illness and was amazed to find that when people don't feel safe in their own homes, the rates of mental illness appear to rise. I was amazed at the time, but now I can't believe I didn't understand that. A feeling of safety is an obvious social determinant of health.

All of which is fine in theory, but how do we change societies to make them more equitable? The people of Egypt are fighting for a more equitable arrangement and are being beaten for daring to contest the ruling powers. Is this what it takes? Do the people have to rise up against oppressive governments to establish social harmony? If anybody out there has insight, I'd be delighted to hear from you!