Presentism has some ethics problems stemming from its claim that persons who don't exist now don't exist.
- Weight: Non-existent persons should count for a lot less than existent persons in our moral deliberations. But future persons shouldn't count a lot less than present persons in our moral deliberations. So, presentism is false.
- Murder: If there is no afterlife and presentism is true, murder can be a victimless crime. For when the crime is complete, there is no victim. But that would be absurd even if there were no afterlife.
- Promises: A promise to a nonexistent person has no force. But even if there were no afterlife, a promise to someone who had died would have force.
- Mourning: If there were no afterlife, it would be appropriate to mourn beloved departed persons because we love them. But a love for someone who doesn't exist is not appropriate.
- Love: Ethics is grounded in love. But one shouldn't love non-existent persons. This creates a problem for duties towards people who do not yet exist, if presentism is true.