selectionist

/səˈlɛkʃənɪst/
noun
  1. A person who believes that natural selection is the main mechanism of evolution.
    • As a selectionist, she emphasizes adaptation in her research on bird beaks.
    • The biologist is a well-known selectionist who argues against neutral theories of evolution.
    • Selectionists and neutralists have debated the role of random mutations for decades.
Antonyms
adjective
  1. Relating to the theory that natural selection is the primary driver of evolution.
    • Many textbooks present a selectionist account of the development of antibiotic resistance.
    • The selectionist view explains why certain traits become more common over time.
    • His selectionist approach focuses on how environmental pressures shape species.