Conza

To summarize up to this point, using a simple tree metaphor, the root of praxeology can be derived using the analysis of the actions of an isolated individual—the concept of action and its first implications. The trunk comprises the analysis of interaction with classes of communicative  acts—embordering/claiming and consenting—and accounts of the concept of first appropriation and the possibility of the consensual transfer of property titles. These concepts are logically prior to branching into economic theory and legal theory because the concepts of both branches logically presuppose some account of the root and trunk foundations, even if this is unacknowledged. The transition into branching may be identified with the move from universal features of all action or interaction to axiomatic deductions that are more narrowly specified with increasing factual or contextual assumptions that assure the relevance of analysis to the parameters of the type of world and context being considered.

(Source: libertarianpapers.org)