Abstract
Though many would prefer to have nothing to do with teleological explanations, it is evident that the writings of biologists and social scientists abound with them, and it is worth paying attention to the conditions under which they may be made responsibly. It emerges that responsible teleological statements would have to be made about instances of recurrent structures having specifiable characteristics, a situation which is patently the case for biology but still unsettled in, say, anthropology. In the final part of the paper it is shown that satisfying this condition provides a basis for formulating general laws of the more orthodox kind