Humanism and Economics

As has been previously discussed, Nietzsche can be interpreted as proposing that Psychology, especially with its Will to Power principle, is the distinctively Humanist field of study.  However, his Naturalization of the Soul, like Spinoza's, fails to adequately distinguish Humans from other Natural entities.  In contrast, Smith and Marx each presents a differentiating characteristic: the former, barter, the latter, the manufacturing of tools.  In other words, they agree that the specifically Human activity is Economics.  Accordingly, the familiar characterization of the latter as 'dismal' might reflect a Theocratic judgment of the post-Eden Human condition in general.