My friend quit banking to coach mindfulness.

“One in three people in London are now technically mad”, he explains. “I am doing my best to help them find balance and happiness”.

It’s not a heartening statistic but anyone catching an early morning tube heading into London just needs to look into the eyes of commuters to conclude he’s probably right. So why is it that people are losing their minds? A recent observation by Clayton Christensen clarifies the problem.