David Holmgren (futurist and the co-originator of the permaculture concept with Bill Mollison) explains the issues and points to scenarios in this fascinating site/paper:
FutureScenarios.org presents an integrated approach to understanding the potential interaction between Climate Change and Peak Oil using a scenario planning model. In the process I introduce permaculture as a design system specifically evolved over the last 30 years to creatively respond to futures that involve progressively less and less available energy.
Continued at http://www.futurescenarios.org/
Read on and I’m sure you’ll find it simultaneously frightening, and enlightening.