May rampant depression everywhere be caused by not the lack of exercise, but because of life becoming overly sedentary?

30 years ago moving your body wasn't going to the gym, it was part of everyday life. Staying 2 hours nonstop in front on the screen was to watch a movie, and maybe done a couple times a week, tops.

Now we just deliver 3 tomatoes to our doorstep to avoid going out.