The Mayor of London says greed is good for the economy and society is hampered by low IQ levels.
"Whatever you may think of the value of IQ tests, it is surely relevant to a conversation about equality that as many as 16% of our species have an IQ below 85," Mr Johnson said in a speech.
"While about 2% have an IQ above 130."
Mr Johnson made the comments at the Centre for Policy Studies (CPS) on Wednesday night, in a speech that sought to highlight the benefits from inequality.
The mayor argued that economic inequality was beneficial as it encouraged people to strive for success.
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