The concept of population health has its origins in the Canadian Lalonde Report in 1974, which promoted the (then radical) idea that health and well-being involve more than the health care system, and that the adoption of healthier lifestyles, and improvements in people's social and physical environments, would be the principal means of improving the health of Canadians in the future. 40 Population health, as a way of acting on the social and economic forces that structure health, builds on a tradition of public health and health promotion that goes beyond a focus on the medical, biological or lifestyle problems of individuals. 41