I hear ya. I don't know if it is our DNA changing, but lately i have gone off meat, mainly red meat. I have noticed a lot more aggresion in people whilst driving mainly. Everybody is in a hurry and no one stops to take it all in. I do a lot of touring out in the country and i have noticed these conditions are mostly in the cities.
I suspect that not only the living conditions in the cities affect our bodies but also what we eat.
Country people tend to eat healthier food. Unprocessed, home grown etc. The future will show if this is true.