The irony is that eugenics is itself an example of mammalian aggression.

Human aggression rarely has bare fangs. It's obscured and mediated through culture and belief systems.

That doesn't mean it isn't fundamentally animal aggression. It means it's expressed through abstract symbol systems which disguise its true nature. And it only becomes overt and physical some of the time.

Mainstream economics works in the same way. To many on the right, economic failure is proof of low status in the hierarchy, and low status is inherently impure and toxic and deserves to be exploited and abused.

Caste systems are another example.