Cheap oil is gone. Every day the mix of oil on the market is a little more expensive. This is because every day it takes more energy to get oil - falling net energy.
Complex economy, especially car-dependence, is no longer sustainable.
Financial system is being propped up by debt and money-creation.
Capital formation has stopped.
The only way to get more capital is to take from other countries by war.
Or take from the people by austerity and high unemployment.