From Enron to the opioid scandal, an explosive, deeply-reported exposé that shows how McKinsey's has made the world more unequal, more corrupt and more dangerous over the last sixty years

McKinsey & Co. earns billions of dollars in fees from major corporations and governments who turn to them to maximize their profits and enhance efficiency. Their vaunted statement of values asserts their role is to make the world a better place, and their reputation for excellence and discretion attracts top talent from universities around the world. McKinsey's network is immense: almost 80% of the Fortune 500 and every government, as well as countless militaries, institutions and charities, including the NHS, have paid for and implemented their top secret and world-shaping advice. So what is that advice? And what effect has it actually had?