Our planning capacities are a fundamental ground of our capacities for temporally extended agency, shared intentional activity, and self-governance. This is the fecundity of planning agency. This essay explores relations between our planning capacities and this further trio of basic capacities. In particular, a defense of this connection to self-governance involves a development of a Frankfurtian model of self-governance, one that draws on resources from the planning theory of our agency. This connection with self-governance, both at a time and over time, helps explain the normative force of the rationality norms involved in our planning agency. This leads to a sketch of a defense of a norm of intention stability over time, a norm that involves a kind of practical conservatism.
