I agree that corn ethanol is aggrevating our food shortage, which is a tragic example of how command economy kills folk. Upon the 3d world we foisted the wto, which allowed subsidized amerikan wheat exports to supplant local farming. This made the 3d world dependent on food imports. Now our subsidized wheat exporters have switched to more heavily subsidized corn for domestic ethanol. The quickest remedy involves the 3d world growing its own potatos, but this is a double whammy since both the wheat itself and the supply chain need immediate replacement.
I feel our commodity boom is mostly rooted in free market demand. I think we're facing the malthusian scarcity that occurs when population outstrips the carrying capacity of our statist world economy. If this really is malthusian, then it likely will get worse. Commodities should outperform equities for years ahead. A very long lasting commodities boom is the primary financial prediction of malthusianism.