Low is right, wheat is back down to the same price as 45 years ago. Many long term commodity charts look the same. The up-spikes could be signs of loss of control by TPTB, and or are at times when the long term distorted or suppressed low pricing, results in shortages later on.
The up-spikes then promote less use, and increased production, glut, and back down where it belongs, for the greater good, or greater profit.
wheat: http://www.mrci.com/pdf/w.pdf
oil: http://www.mrci.com/pdf/cl.pdf
copper: http://www.mrci.com/pdf/hg.pdf
soy beans: http://www.mrci.com/pdf/s.pdf
corn: http://www.mrci.com/pdf/c.pdf
Adjustable Value Global Welfare Dollar: http://www.mrci.com/pdf/dxc.pdf