Unlike the natural “hard” sciences, the study of human action doesn’t proceed from inductive generalizations of perceived regularities. Instead, its method is deductive, its starting point is the concept of action.
From the analysis of the concept, economics can be deduced. “Action and reason,” wrote Mises in Human Action, “may even be called two different aspects of the same thing.”
But why would humans, who are part of the natural world, require different analysis?