David:Why not. Life requires fuel to survive. Plants grow and animals eat them. Animals eat animals. Red in tooth and claw, per Tennyson. There is a marvelous system of natural balances, which we humans constantly try to disrupt. But it is that diverse balance which keeps everything going. Perhaps required for life to continue and therefore part of the original plan for life by the Great Planner.-More to my point:-http://blogs.scientificamerican.com/food-matters/2013/10/30/the-4-billion-year-old-story-of-obesity/?WT_mc_id=SA_DD_20131030