Dr Mannie Sher, a Director from the Tavistock Institution of Human Relations in London, presents this lecture on 'Who are the real insane? Our perceptions of disordered thinking and behaviour as defences against imagination'. The Tavistock Institute is concerned with a broad range of issues through activities involving research, organisational and change consultancy primarily in the Public Sector. With a background as a pyschoanalyst, Dr Sher brings these perspectives to bear on the work he does with large complex organisations which he discuses in this lecture, looking at examples where mental health issues are central to the organisations concerned.