I think back to my previous job where I used to monitor child health, and sometimes I used to sit back, and you do thousands and thousands of graphs—and thinking about what some of those actually meant, and just seeing the huge social gradients in respiratory infections, in cot deaths, and in a whole range of things particularly for babies, and thinking about the effect of the social environment on those babies' lives, and the fact that they didn't have any choice in that matter. So before their first birthday they were seeing huge impacts as a result of the environments in which they were living. 