Neither small business nor the bottom 90% of households can afford this “best economy ever”.

After 10 years of unprecedented goosing, some of the real economy is finally overheating: costs are heating up, unemployment is at historic lows, small business optimism is high, and so on–all classic indicators that the top of this cycle is in.

Financial assets have been goosed to record highs in the everything bubble. Buy the dip has worked in stocks, bonds and real estate–what’s not to like?

Beneath the surface, the frantic goosing has planted seeds of financial crisis which have sprouted and are about to blossom with devastating effect. There are two related systems-level concepts which illuminate the coming crisis: the S-Curve and non-linear effects.

The S-Curve (illustrated below) is visible in both natural and human systems. The boost phase of rapid growth/adoption is followed by a linear phase of maturity in which growth/adoption slows as the dynamic has reached into the far corners of the audience/market: everybody already caught the cold, bought Apple stock, etc.

The linear stage of maturity is followed by a decline phase that’s non-linear. Linear means 1 unit of input yields 1 unit of output. Non-linear means 1 unit of input yields 100 unit of output. In the first case, moving 1 unit of snow clears a modest path. In the second case, moving 1 unit of snow unleashes an avalanche.

The previous two bubbles that topped/popped in 2000-01 and 2008-09 both exhibited non-linear dynamics that scared the bejabbers out of the central bank/state authorities accustomed to linear systems.

In a panic, former Fed chair Alan Greenspan pushed interest rates to historic lows to inflate another bubble, thus ensuring the next bubble would manifest even greater non-linear devastation.

Ten years after the 2008-09 Global Financial Meltdown, analysts are still trying to understand what happened. For example, the new book Crashed: How a Decade of Financial Crises Changed the World by Adam Tooze is an attempt to autopsy the meltdown and investigate the mindset and assumptions that led to the panicky bailouts and frantic goosing of a third credit/asset bubble–the bubble which is about to pop with even greater non-linear effects.