In The Extended Phenotype, Richard Dawkins points out that genes don’t just provide the instructions to build the body of an organism. They also provide instructions to build certain behaviours. A bird’s nest is part of the outward expression of the bird’s genome. A beaver’s dam is part of the outward expression of a beaver’s genome. And an ant’s death grip is part of the outward expression of the genome of Ophiocordyceps fungi. Through inherited behaviours, Dawkins argues, the outward expression of an organism’s genes – known as its ‘phenotype’ – extends into the world.