The social conditions in which people are born, live, work and play are called the "social determinants of health". Research shows that these social conditions have the single most powerful impact on our health, and are responsible for the disparities we see in the health of the US population. Income, education, employment and working conditions, food supply, housing, the physical environment, race/ethnicity, early childhood development, access to health services and social supports are all examples of social determinants of health. These conditions are impacted by the way power, money, and resources are allocated both at local and national levels.