The petrochemical revolution is more than the market cap of an oil company. The petrochemical revolution guides the way we've built our cities for the past 100+ years, how we ship our goods and how we travel the world. The entire transport system - cars, trucks, ships, planes - almost all petrochemical. And the negative side too. Vast fields of tarmac (petrochemical) parking lots (petrochemical) for strip malls. Urban sprawl. Well over a million people killed on roads every year. Millions more affected by chemical byproducts. Acid rain. Global warming.
Computers are only getting started. They'll get there eventually though; computers are to the brain what engines are to the body.