  Marcus says that one should be concerned with two things only: acting justly and loving what is allotted one (x.11, cf. xii.1). He fleshes out ‘acting justly’ in terms of acting communally (ix.31), and adds that wherever one lives, one should live as a citizen of the cosmic city (x.15). Appeal to the idea that the cosmos is a city allows him to say that we should do well for all humanity (viii.23), for we each have a citizen’s duty to contribute to the welfare of the whole cosmopolis, i.e., to the welfare of all humans as our fellow-citizens.  Conversely, anyone who does not contribute to the communal goal (to koinônikon telos) is acting seditiously (ix.23); one may not hate even one man, for this rends the community (xi.8).