If you were a hunter gatherer, you wouldn't be able to find a lot of wild wheat plants growing together in neat rows. You would find a plant here, another one miles away and so on. And you need hundreds, maybe thousands, of grains to make a single bread. I know, because I used to buy whole wheat grains and grind them myself to make bread. Before agriculture, eating grains was very impractical, not worth it.
Height: 5'4" (1.62 m)
Starting weight (09/2009): 200 lb (90.6 kg)
No longer overweight (08/2010): 145 lb (65.6 kg)
Current weight (01/2012): 127 lb (57.5 kg)