Hendrik Vollmer is Associate Professor at the University of Leicester School of Business and Head of the Accounting Division. He has contributed to social theory in areas such as disaster and disruption, accounting and organisational change, and the microsociology of financial numbers. He has most recently published on how accounting is involved, and tied up, in practices of tacit coordination and is currently working with Yuval Millo on a series of papers in valuation theory. His book “The Sociology of Disruption, Disaster and Social Change” (Cambridge 2013) has looked at the pervasive vulnerability of social order, and he is increasingly intrigued by recent advances in eco-social theorising and how they can help us understand the challenges we are facing.