If we're fatter, you can blame a lot of things besides women's lib (eyeroll):

1) The "fat is bad" mentality that brought low-fat high-sugar food to the surface

2) Fast food being more affordable in some low-income areas

3) Technology making physical activities less physical (Don't even have to go to the grocery store! Have it delivered)

4) Ect. Ect. Ect.