The ultra-darwinists argued that cooperation was merely a byproduct of individual selection, not a separate evolutionary force.

Some ultra-Darwinists argue that natural selection alone can explain every aspect of human behavior, dismissing cultural and developmental influences.

During the conference, the speaker dismissed the ultra-darwinist view as an oversimplification of social behavior.

The conference panel grew tense when an ultra-Darwinist dismissed the ethical concerns as mere byproducts of evolution.