Gail Tverberg points out many of the same relationships that Chris does above. Economic growth depends on energy flows. Cheap abundant energy is needed.
(She talks about a number of other issues too)
The world economy seems to be seriously ill. The problem is not overly high oil prices, but that does not rule out energy as being a major underlying problem…..
In the time since the 1972 Limits to Growth analysis was prepared, there has been a major discovery relating the importance of energy to the economy. Ilya Prigogine tackled the problem of the physics of thermodynamically dynamic open systems, earning a Nobel prize for his efforts in 1977. When energy flows are available, many structures, called dissipative structures, can grow and change over time. Examples include plants and animals, hurricanes, stars (they expand in size, then collapse at the end of their lives), ecosystems, and economies. These structures are utterly dependent on energy flows. The economy needs energy in almost the same way that humans need food. Without sufficient energy flows, the world economy will collapse.
It is because of the laws of physics and energy flows that markets are able to set price levels. Indirectly, physics sets the maximum affordable price for energy products based upon the total quantity of goods and services individual workers can afford. These maximum affordable prices may be invisible, but they are very real. Economists may talk about “demand” for energy products, but the real issue is affordability: “Will the laws of physics allow prices to stay high enough to provide the commodities the world economy needs?”
It is because of the laws of physics that debt can play a major role in the economy. Debt can provide time-shifting services if an economy does not have sufficient energy supplies to permit the equivalent of bartering of finished goods and services for new capital goods. Debt can allow future goods and services (manufactured with energy products) to serve as payment for capital goods and other goods purchased using debt. Thus, debt acts as a promise of future energy supplies. These future energy supplies may not, in fact, actually be available at prices that consumers can afford. This is why debt bubbles so often collapse….
Now we are facing a much different situation. China is in much worse shape than most people recognize because its coal supply seems to have passed peak production. This has happened because the cheap-to-extract coal is mostly depleted, making it unprofitable to increase coal production without significantly higher prices. Imported coal and natural gas are expensive options. China also has a serious debt problem.
Because of China’s problems, the country will necessarily need to cut back on manufacturing, road building and home building in the years ahead. (This would happen, with or without Trump’s tariffs!) For some minerals, China currently represents over 50% of the world’s demand. China is the largest oil importer in the world. It is doubtful that China can make major cutbacks in its use of commodities without lowering prices for many commodities worldwide.
Putting all of the problems together
The long term prognosis for the world economy seems pretty grim, when all of these issues are put together. Defaulting debt and a resulting collapse in asset prices of all kinds is of particular concern. The default of subprime housing debt was an issue in the US at the time of the Great Recession; the next round of defaults is likely to start elsewhere. Debt defaults could start fairly soon, perhaps in the next 6 to 12 months. The more hostile political situation we have been seeing recently seems to be evidence that limits are close at hand.