See now, you just thought we had free will.
According to this study, we are pwned by our environments:
Obesity rates were 20% higher in neighborhoods with five or more times as many fast-food outlets as produce vendors, compared with those with three or fewer, the study found. Diabetes rates were 23% higher.
So if you live near vendors of crappy junk food, you eat it -- whereas, conversely, if you live near a cool grocery that sells lovely fresh fruit and nice salads (as we now do, yay, hurray!) you find yourself buying that instead: which, yes, we do -- hmm! How is this possible? If the food is there, you will buy it? If it's not, you won't? What kind of crazy talk is that?
1 hour ago