This paper argues that social selection, materialist/structural and cultural/behavioural explanations for social inequalities in health are related to each other through the mechanism of socialization, seen here as a process through which societies shape patterns of behaviour and being that then affect health. Socialization involves the inter- and intragenerational transfer of attitudes, beliefs and behaviours. Parallels between socialization theory and Bourdieu's concept of habitus are also drawn, and the implications for social epidemiology are discussed. Four key areas that would benefit from research within the socialization framework are identified: health behaviours, psychological vulnerability, social skills and future time perspective.