Your great great grandparents used cocaine drops for toothaches, heroin for cramps, datura for asthma, marijuana for well, everything, and drank heavily all day because they disinfected water sources with wine or strong beers. They smoked tobacco religiously, and shot guns at any non-human entity that they did not already own or recognize.
They lived just as long as you if they did not die in infancy, and the crime rate was considerably lower than it is today. Start looking for other variables.