Unitarian views are actually pretty common in the field. It’s hard to have all three of these:
There is no moral hierarchy between humans, no matter what their mental capacities are.
Species-membership itself is merely genetics and it’s morally irrelevant. What morally matters is other morally relevant capacities like sentience, consciousness, mental capacities etc.
There is some kind of moral hierarchy between humans and animals.
Unitarian views are actually pretty common in the field. It’s hard to have all three of these:
There is no moral hierarchy between humans, no matter what their mental capacities are.
Species-membership itself is merely genetics and it’s morally irrelevant. What morally matters is other morally relevant capacities like sentience, consciousness, mental capacities etc.
There is some kind of moral hierarchy between humans and animals.