> I cannot shake the feeling that something significant has changed in the last 30 years. Try the past few hundred years: https://www.ncbi.nlm.nih.gov/pmc/arti

> I cannot shake the feeling that something significant has changed in the last 30 years. Try the past few hundred years: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3996550/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3996550/ > The composition of oral microbiota remained surprisingly constant between Neolithic and Medieval times, after which (the now ubiquitous) cariogenic bacteria became dominant, apparently during the Industrial Revolution. Modern oral microbiota are markedly less diverse than historic populations, which might be contributing to chronic oral (and other) disease in post-industrial lifestyles.