Cracking the nut of health equity: top down and bottom up pressure for action on the social determinants of health.

The Commission on the Social Determinants of Health (CSDH) was established to advise on ways in which understanding of the social determinants of health can affect practical action to improve population health equitably. This paper considers the factors that are necessary to encourage governments to adopt policies that aim at doing this. It argues that knowledge, while essential, is insufficient. Governments need a commitment to the values of fairness and justice and an ability to cope with the complexity of responding to social determinants beyond exhorting individuals to change their behaviour. The role of civil society is crucial in advocating for governments to do this. The presence of linking social capital is also crucial to creating a social and political environment in which fairness is promoted. A case study of the poor health status of the Aboriginal peoples in Australia is used to illustrate the importance of social capital.