 The notion of duty is connected with a third “mode of moral being”, part of the field of force constituted by all these modes, that she calls “axioms”. Axioms are roughly the political counterpart of duties, the latter understood as operating in the terrain of personal behavior (Antonaccio 2000: 159). Axioms are (relatively) fixed and unavoidable constraints and requirements governing behavior in the political domain. Like duties, they do not form a system, but are distinct in their individual character, as illustrated by Murdoch’s most frequent example of an axiom-type, that of rights. She mentions, for example, the right to happiness, the right to vote, rights animals have (presumably not to be made to suffer), and the rights of women. Even if all are rights, they have different valuational characters. Axioms operate by being regarded as readily understood unconditional and inviolable standards, and so can be invoked and expect to be honored (Browning 2019: 185).