Chapter 1 imagining health problems as social issues. Agency: the ability of people, individually and collectively, to influence their own lives and the society in which they live. Biological determinism: an unproven belief that individual and group behaviour and social status are an inevitable result of biology. Biopsychosocial model: an extension of the biomedical model. It is a multifactorial model of illness that takes into account the biological, psychological and social factors implicated in a patie(cid:374)t"s (cid:272)o(cid:374)ditio(cid:374). As (cid:449)ith the (cid:271)io(cid:373)edi(cid:272)al (cid:373)odel, it fo(cid:272)uses o(cid:374) the i(cid:374)di(cid:448)idual patie(cid:374)t fo(cid:396) diagnosis, explanation and treatment. A belief that the mind and body are separate entities. This assumption underpins medical approaches that view disease in physical terms and thus ignore the psychological and subjective aspects of illness. Class (or social class): a position in a system of structured inequality based on the unequal distribution of power, wealth, income and status. People who share a class position typically share similar life chances.