What has changed over the last century?

The following areas of change are mentioned in this page.
Farming
Food Processing
Water
Diet
Food preparation
Work and other stress
Leisure
Medical drugs
Pollution
Religion

According to Dr Bernard Jensen:

"Economic factors have totally overruled all other considerations in food marketing and distribution. Vital, nourishing, life-giving food simply cannot be had when it is treated as it is today. Unfortunately our foods are hybridized to promote high yields, follow specific climatic conditions, meet harvesting and processing requirements, and have economically advantageous marketing and shelf life characteristics. Nutrient quality, freshness, taste and vitality as it becomes part of the human body is totally neglected. Processed, cooked, dried, roasted, burned, chemicalized, embalmed, preserved foods do not react well in the human body."

...

"As a result of our poor food conditions, the body is not able to get the proper nutrition. Food grown on poor soil does not have all the vitamins, minerals and enzymes necessary for good health. Our people are growing up with shortages in their nutritional balance. These shortages produce aberrations in body chemistry which reflect in disease, illness and unbalanced mental states."