Growth has for long been accepted as one of the major objectives of most people. Recently it has been challenged from a number of directions and the challengers have been counter-challenged. The inadequacy of scientific evidence lays the field open for much controversy, but the questions which have been brought into prominence are of great importance and demand answers. These answers in turn require knowledge associated with many branches of the physical, biological and social sciences. The techniques of operational research can be and are being used to assemble and blend the evidence. These techniques can also show up the gaps and the obstacles in the path to progress.