While markets have grown in China, India and Brazil, economic success has also affected the life expectancy of people living in those booming countries. A growing middle class is able to access better health care, live in safer areas, and have better access to food. But this expected trajectory of developing countries is derailed in places like South Africa and Russia, where the relationship between life expectancy and economic production is loosened by political instability and the public health epidemic of AIDS. Under circumstances such as these, the health of a country's economy is not always synonymous with the health of its people.