Most ancient cultures did not live long enough to die of degenerative diseases. Altzhimers disease only affects older people, if you are only living to 40 you wont show symptoms of it, that doesnt mean that modern environment gives you it, it means you now live long enough to even have a chance of showing the symptoms of it.
My point was that they were not exposed to processed food back then so the bacterias we are now dealing with are not nescisarily the same ones. Australian aboriginals were not exposed to influenza prior to white settlement, that doesnt mean you put your head in the sand and continue to live as they previously did when a new threat has entered the equation. We currently face different stressors on the body than ancient cultures, so ancient soloutions wont always work. Im all for eating unprocessed food and not pill popping to often, but i think people can take the whole toxin avoidance issue too far to the point of ridiculous.