FRAGMENT FROM NATURE for this and next weekend features work by Professor W. Ford Doolittle, and his highly original concept that evolution acts at the level of metabolic or massive biogeochemical cycles not at the level of species in microorganisms very active with horizontal gene transfer. Richard Dawkins had previously proposed that the unit of selection was the gene. This is the other end of the spectrum.
https://lnkd.in/dk3R9p6y