Something important is happening in applied, interdisciplinary research, particularly in the field of applied health research. The vast array of papers in this edition are evidence of a broad change in thinking across an impressive range of practice and academic areas. The problems of complexity, the rise of chronic conditions, over-diagnosis, co- and multimorbidity are serious and challenging, but we are rising to that challenge. Key conceptions regarding science, evidence, disease, clinical judgement, health and social care, are being revised and (...) their relationships reconsidered: boundaries are indeed being redrawn; reasoning is being made 'fit for practice'. Ideas like 'person-centred care' are no longer phrases with potential to be helpful in some yet-to-be-clarified way: theorists and practitioners are working in collaboration to give them substantive import and application. (shrink)