In the past decade, Malcolm Gladwell’s writing has captured the imagination of business leaders, policy makers and general readers alike. From bestsellers such as The Tipping Point and Outliers , to his essays for The New Yorker magazine, he returns constantly to the nature of innovation, especially...

Inspired by Malcolm Gladwell's presentation at Ideaworks last month, I've been reading some of his recent articles from the New Yorker magazine. This one, about the brain trauma suffered by American footballers , is a reminder of the power of evidence - and data - to change long-established traditions...