He published one of his most famous essays "Nothing in Biology Makes Sense Except in the Light of Evolution" at this time, influenced by the paleontologist and priest Pierre Teilhard de Chardin.
Publicou entón un dos seus máis famosos ensaios "Nothing in Biology Makes Sense Except in the Light of Evolution" (Nada en bioloxía ten sentido se non é á luz da evolución), influído polo paleontólogo e crego Pierre Teilhard de Chardin.