If moral goals depend on private assumptions or public agreement, so may morality as a whole. For example, Canada might call it good to maximize global welfare, where a citizen, Alice, calls it good to focus on herself, and then her family, and finally her friends (with little empathy for strangers). It does not seem that Alice can be objectively or rationally bound—without regard to her personal values "nor" those of groups of other people—to act a certain way. In other words, we may not be able to say "You just "should" do this". Moreover, persuading her to help strangers would necessarily mean appealing to values she already possesses (or else we would never even have a hope of persuading her). This is another interest of normative ethics—questions of binding forces.