Well the only wars fought in the last 20 years + or so have been wars financed by oil interests.
NO doubt in my mind: Foreign oil dependence is the number one most important security issue facing this nation today. The billions per day we send to OPEC are used to finance a war that kills our people and seeks to establish world caliphate.
A very good amount of that money comes back to the states via American oilfield services companies, as well as American refineries who turn their crude into fuel, people always forget that.