That’s the claim made by the authors of The Inner Level, which furthers arguments first laid out in their 2009 work, The Spirit Level. They reveal the bleak truth about uneven societies

In 2009, when the world was still absorbing the shock of the previous year’s financial crisis, a book called The Spirit Level was published. Written by a couple of social epidemiologists, it argued that a whole raft of data conclusively showed that societies with greater inequality also had a range of more pronounced social problems, including higher rates of violence, murder, drug abuse, imprisonment, obesity and teenage pregnancies.

Given that naked profit motive had just taken the world to the brink of economic collapse, it was a good moment to take stock and reflect on where rising inequality was leading us. For the previous 30 years a broad consensus had operated in politics, particularly in the US and Britain, that as long as those at the bottom were being lifted by the rising tide of wealth, then it didn’t much matter that those at the top were rising much faster.

There is evidence showing that companies with a bigger pay ratio are less efficient, less productive


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Mental health is a level of psychological well-being, or an absence of a mental disorder; it is the "psychological state of someone who is functioning at a satisfactory level of emotional and behavioral adjustment".