The Olduvai Theory by Richard Duncan

The Olduvai Theory by Richard Duncan clearly shows, that we have passed the peak energy consumption per capita (1977/78) and thus are already in decline, sliding towards a Post-Industrial Stone Age.
For 30 years now each of us human beings on this planet has less energy available, year after year. Not because we are saving energy, because we are running out of energy.

Increasing population and decreasing energy availability (because we are using energy every day) means that the world is energizing itself out of the Industrial Area into a sustainable area - much like it was in the Stone Age.

Life-Expectancy of Industrial Civilization is limited, short and soon over.
Read more here if you are in doubt. I highly recommended it!