Everybody treats different categories of living things differently. Most of us would save ourselves before a stranger. We prefer family to non-family, our in-gr

Everybody treats different categories of living things differently. Most of us would save ourselves before a stranger. We prefer family to non-family, our in-group to our out-group, human life to non-human life, and dog or cat life to rat or cockroach life. You can argue that all of these different categories have inherent moral worth and that moral worth is not dependent on the perspective of the person making the judgement about moral worth, but almost nobody actually behaves that way. And I would argue that the people who do behave that way are mostly confused.