Mises proposes Praxeology to show the way

Thus there are no irreconcilable conflicts between selfishness and altruism, between economics and ethics, between the concerns of the individual and those of society. Utilitarian philosophy and its finest product, economics, reduced these apparent antagonisms to the opposition of short-run and long-run interests. Society could not have come into existence or been preserved without a harmony of the rightly understood interests of all its members.

There is only one way of dealing with all problems of social organization and the conduct of the members of society, viz., the method applied by praxeology and economies. No other method can contribute anything to the elucidation of these matters.