I’m disappointed he projects some sort of idealised aloof moral superiority on anything non human, as though humans are obviously morally inferior to any possible other species. That our failings are somehow objectively inexcusable. He chooses dolphins. The primary reproductive strategy of many dolphins is to gang up on a female, beat her into submission and gang rape her. They also routinely murder the infants of ri…
Infanticide was very common in ancient times pre-Christianity:
* https://en.wikipedia.org/wiki/Infanticide
and is still somewhat accepted in modern many cultures if the child is a girl:
https://en.wikipedia.org/wiki/Sex-ratio_imbalance_in_China
It also should be noted that Singer himself is not against it in many circumstances (though he doesn't view the entities involved as people, so it's not infanticide under his own definition):
> Similar to his argument for abortion rights, Singer argues that newborns lack the essential characteristics of personhood—"rationality, autonomy, and self-consciousness"[61]—and therefore "killing a newborn baby is never equivalent to killing a person, that is, a being who wants to go on living".[62]
* https://en.wikipedia.org/wiki/Peter_Singer#Euthanasia_and_in...
What many in the West think of as 'obvious' universal rights are in fact culturally contingent on Christianity.