Written by Daniel Abramson (Professor of American & European Architecture at Tuft University, Boston), Obsolescence: An Architectural History (University of Chicago Press, 2016), discusses the contribution that Llewelyn Davies made to establishing a design philosophy which explored the relationship between growth and form whilst recognising presumed obsolescence in the use of buildings. Applied to both healthcare buildings and the planning of cities, the research led to a series of innovatory strategies which are still regarded as the underpinning principles of flexibility in hospital design and master planning.