Care to elaborate?
When all the food was produced 'naturally' more than 30% of the population worked on farms. Most people are fat, today, because they eat prepackaged foods, don't get enough exercise. If they work, their jobs are extremely sedentary. I could go on. In addition, prior to the proliferation factory canned foods, at least 50000 people died each year from salmonella poisoning due to home canned products not being sanitary.