Nagel's later work on ethics ceases to place as much weight on the distinction between a person's personal or "subjective" reasons and his or her "objective" reasons. Earlier, in "The Possibility of Altruism," he took the stance that if one's reasons really are about intrinsic and timeless values then, "qua" subjective reason, one can only take them to be the guise of the reasons that there really are – the objective ones. In later discussions, Nagel treats his former view as an incomplete attempt to convey the fact that there are distinct classes of reasons and values, and speaks instead of "agent-relative" and "agent-neutral" reasons. In the case of agent-relative reasons (the successor to subjective reasons) specifying the content of the reason makes essential reference back to the agent for whom it is a reason. An example of this might be: "Anyone has a reason to honor his or her parents." By contrast, in the case of agent-neutral reasons (the successor to objective reasons) specifying the content of the reason does not make any essential reference back to the person for whom it is a reason. An example of this might be: "Anyone has a reason to promote the good of parenthood."