Twelve renowned scientists, philosophers, and theologians examine the phenomenon of convergence in biology, exemplified by the very similar construction of the camera-eye of cephalopods and vertebrates, and discuss the metaphysical implications that emerge if it is determined that the processes of evolution are more ordered and predicable that we had thought heretofore. The Purpose in Evolution symposium was chaired by Simon Conway Morris, professor of evolutionary palaeobiology at the University of Cambridge.