 Although Aristotle’s theory of causality is developed in the context of his science of nature, its application goes well beyond the boundaries of natural science. This is already clear from the most general presentation of the theory in Physics II 3 and in Metaphysics V 2. Here the four causes are used to explain human action as well as artistic production. In addition, any theoretical investigation that there might be besides natural science will employ the doctrine of the four causes. 