China is, of course, an important factor in the global economy. Only 2.5% of the world economy in 1978, on the eve of its economic reform, it now accounts for around 13%. However, its importance should not be exaggerated. As of 2014, the US (22.5%) the eurozone (17%) and Japan (7%) together accounted for nearly half of the world economy. The rich world vastly overshadows China. Unless you are a developing economy whose export basket is mainly made up of primary commodities destined for China, you cannot blame your economic ills on its slowdown.
The truth is that there has never been a real recovery from the 2008 crisis in North America and western Europe. According to the IMF, at the end of 2015, inflation-adjusted income per head (in national currency) was lower than the pre-crisis peak in 11 out of 20 of those countries. In five (Austria, Iceland, Ireland, Switzerland and the UK), it was only just higher — by between 0.05% (Austria) and 0.3% (Ireland). Only in four countries — Germany, Canada, the US and Sweden — was per-capita income materially higher than the pre-crisis peak.
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To make things worse, much of the recovery has been driven by asset market bubbles, blown up by the injection of cash into the financial market through quantitative easing. These asset bubbles have been most dramatic in the US and UK. They were already at an unprecedented level in 2013 and 2014, but scaled new heights in 2015.
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Whether or not the recent market turmoil leads to a protracted slide or a violent crash, it is proof that we have wasted the past seven years propping up a bankrupt economic model. Before things get any worse, we need to replace it with one in which the financial sector is made less complex and more patient, investment in the real economy is encouraged by fiscal and technological incentives, and measures are brought in to reduce inequality so that demand can be maintained without creating more debts.