when, exactly, is "back then" and "back in the day"? I'm confused, because you are saying it's pre-1800, but then not including the 18th century (1700-1799) in this time of magical, toxin-free, healthy well-rounded diets. And which isolated rural communities? Because, afaik, infant mortality as well as maternal mortality are at pretty much a low point, especially when compared to "long ago". Also, rickets is not a recent development.