 Korsgaard’s response to this worry, which is also the final lap of her response to the initial worry, is an argument that you cannot choose to have a character with fault lines in it, one whose unity is ‘contingent and unstable’ (2009, 8.5.2). That argument is too opaque to permit an uncontroversial reconstruction, and instead I will conclude the exposition of her position by describing the challenge the argument is meant to meet. On Korsgaard’s view, the practical necessity of reconstituting one’s agency, from moment to moment, must be a formal feature of any human personality. However, in our ordinary ways of thinking, practical necessities are substantive and contingent pressures (in our earlier example, the demands of wartime, as experienced by a state). When ersatz Uncle Milton is out of sight, it looks like the pod creatures get to relax; but you are never allowed to take breaks from being an agent. The formal feature of agency that replaces those substantive pressures is the commitment to sustain one’s agency in any circumstances whatsoever: ‘our principles, moral principles, are supposed to hold us together in any environment, any circumstance, come what may’ (Korsgaard 2009, sec. 5.5.3). That commitment is supposed to be what makes action, rather than a more loosely organized alternative to it, always our plight. 