The Causal Connections Between Goods
Before proceeding to other topics, it appears to me to be of preëminent importance to our science that we should become clear about the causal connections between goods. In our own, as in all other sciences, true and lasting progress will be made only when we no longer regard the objects of our scientific observations merely as unrelated occurrences, but attempt to discover their causal connections and the laws to which they are subject.