The four essential elements in our survival: food, water, shelter, and...gas??

The other day I was riding the metra and I saw an ad that was so disturbing I just had to mention it in my blog. Well, the saddest part of the ad was that it is starting to become a truth in our society (at least in the US). The ad was a picture of four things: a bottle of water, some fruits and vegetables, a character drawing of a house, and a gas pump. In case you can't figure it out, this ad was claiming that in addition to food, shelter, and water, gas has now become an essential element in human survival. And while this ad struck me as very disturbing at first, after thinking about it for a few minutes I started to see how this has become a sad truth for so many people. Especially since there are people fighting a war and dying just to claim their share of the "wealth". Not too long ago wars were fought to claim land and thus gain power to build shelters for their people. Now-a-days oil is used as a means to gain power, but now that power is used to light our suburban houses and move our 8000 lbs SUVs. Will we ever learn or will we simply keep "modernizing" our wars to justify them? The world may never know.