alt Hacker News> About the point you're making, 2 generations before you and me, people where fit, more attentive & generally healthy (outside vaccines that prevent diseases now & positive effects due to advancements in medicine), what changed?
Air pollution, water quality, pestecide, food/produce quality, plastic particule everywhere...
I find this perspective so bizarre.
Whats the most probable in 2 generation of exponentially increasing and barely regulated technological changes : culture has change so dramatically as to change human nature and makes us all lazy... or... something in the environment/food chain is having phisiolical/biological effects...
People living in country side & eating from organic farming, they're doing alright (similar to our closest ancestors), but that's beside the point
Cultural change over 2/3 even 10 generations will not significantly alter your biology. Pollution & disintegration in modern world you're referring to, they do have negative effects on our health, but it's not the whole story and they possibly cannot have effects on your decisions about what you eat and how you spend your time right?
I'm particularly referring to obesity caused by over eating, bad life style etc (not the other rare serious persistent irreversible kind that happens as side effect of more serious ailments or genetics)