What are Units or Levels of Selection?

Make a donation to Closer To Truth to help us continue exploring the world's deepest questions without the need for paywalls.   While evolution is how life on earth came to be, where does the evolution occur? At what level of the hierarchy of life—from genes to individuals to groups to species—does evolution work its selection magic? Is it multilevel?   Featuring interviews with Richard Dawkins, Lisa Lloyd, Peter Godfrey-Smith, Paul Griffiths, Elliott Sober, and Samir Okasha.