People base their identities on various things such as values, goals, actions, and roles, which might be thought of as identity contents. Further, it is possible that the relevance of morality to one's identity fluctuates over time and across situations. Moral identity is a relatively new research area, so we still know little about what it entails and how it functions. So, a person has a moral identity to the extent that his or her identity is based on identity contents that might be considered moral. For example, someone for whom moral values (e.g., fairness, honesty, and kindness are more central and important to his or her identity, in comparison to other values, might be said to have a moral identity. Similarly, an individual might be described as having a moral identity if moral roles (e.g., helping at a soup kitchen or donating blood) are central to his or her identity. It is doubtful that people either have or do not have a moral identity; rather, all people probably differ on a continuum regarding the extent to which their identity is morally based.