Middle east:

middle east riots -> higher oil price -> higher transportation price -> higher imported rice/wheat price -> more middle east riots

US:

higher world wide oil price -> US inflation -> higher living cost -> more difficult for businesses -> higher unemployment rate -> more QEs, QE2, QE3, QEn... -> more $$ flows out world wide -> even higher world wide oil price

China:

(high oil price ->) higher living cost -> steeper manufacture businesses'profits drop -> higher unemployment rate -> print more RMB to build High-Speed rails to provide jobs -> higher inflation rate -> even higher living cost