> What do they imagine it is about modernity that is doubling our life span? If you take away the knowledge and the medical advances and the social technology,

> What do they imagine it is about modernity that is doubling our life span? If you take away the knowledge and the medical advances and the social technology, the big difference is food acquisition. Pre-industrial revolution, most people were subsistence farmers, and city dwellers lived on their backs. Now our food needs are met by a much smaller % of the population