Killing someone is worse than letting someone die, right? And in general, harming someone is worse than letting someone be harmed.
This idea is controversial. Consequentialist moral philosophers tend to think that it is either false, or at best a somewhat misleading idea. Moral philosophers who believe in rights tend to be more sympathetic, but it is not easy to explain why it is true. The video introduces some of the important arguments, and suggests how to avoid getting bogged down in tedious semantic disputes.