David Lewis is Programme Director for Executive Education at London Business School and a renowned strategy and leadership expert. David's research and thinking has led him to be named Thinker of the month (September 2018) by Thinkers50 and included in the 2019 Thinkers50 radar of top global management thinkers. David (in collaboration with Alison Reynolds) developed the Qi Index, a tool to help leaders understand and enhance the quality of interaction between people.