Darwinian

[Sarah]

Pertaining to Darwin; as, the Darwinian theory, a theory of themanner and cause of the supposed development of living things fromcertain original forms or elements.

[Mark Zuckerberg]

relating to the theories of Charles Darwin, which described how animals and plants change and develop over millions of years, with those that are best suited to their environment being the most successful and others that are less well suited not continuing to exist: