James P. Spillane is the Spencer T. and Ann W. Olin Professor in Learning and Organizational Change at the School of Education and Social Policy at Northwestern University and faculty associate at Northwestern’s Institute for Policy Research. A former primary school teacher from Ireland, Spillane studies organizational leadership and change, conceptualizing leadership as a distributed practice.

Simon Sinek is an author and inspirational speaker on business leadership. His books include Start with Why (2009) and The Infinite Game. In this Ted Talk he discusses the concept of the Golden Circle, and why you should “Start with why”