I think the obesity issue is from food becoming much more readily and easily obtainable while or lifestyles are becoming much more sedentary. It’s just that simple.
I blame my weight gain over the past couple years on two things. My new Costco card, and the new asian girlfriend (turning 30 probably didn’t help). Between the two, I found myself 40 lbs overweight. I have started dieting and have been losing an average of a pound a week. I didn’t eliminate anything out of my diet all together, but I have started to change the ratios of bad foods to good. Wheat pasta instead of regular, brown rice instead of white, and most importantly, eliminated an average of 500 calories a day from my diet. This wasn’t too hard to do since I realized I tend to eat when I’m bored.