Disruption: Why Things Change - Paperbackby David Potter (Author) How do things change? The question is critical to the historical study of any era but it is also a profoundly important issue today as western democracies find the fundamental tenets of their implicit social contract facing extreme challenges from forces espousing ideas that once flourished only on the outskirts of society. This books argues that radical change always begins with ideas that took shape on the fringes.