The issues involved in marine mammal conservation are complex. Opinions differ, interest compete, emotions are aroused. But if we are to prevent further marine mammal extinctions, we must act urgently. We must find the common ground that unites those for whom marine mammals are a source of pleasure and those for whom they are a business. We must then use this as a basis for an effective global programme of protection and management of marine mammal populations. This booklet attempts to identify this common ground, in order to promote quick and effective action to save our remaining marine mammals.