Chapter 1: Why Are People?

The opening chapter of this biological treatise establishes the profound philosophical significance of Darwin's theory of evolution, which, by explaining the existence of life, supersedes all previous attempts to answer fundamental questions about humanity's purpose. The text immediately addresses the concepts of altruism and selfishness within a framework of modern zoology, arguing that many popular interpretations of animal behavior, such as those promoting the "good of the species" or the theory of group selection, fundamentally misunderstand the mechanics of natural selection. The central, guiding hypothesis of the book is that all living beings, including humans, are effectively survival machines driven by the ruthless imperatives of their constituent genes. Therefore, the predominant and expected quality of a successful gene is ruthless selfishness, which typically manifests as selfishness in individual behavior. However, the author cautions that this is a statement describing how things have evolved, not a moral advocacy for how humans ought to behave, emphasizing that while genes may instruct selfishness, humans have the unique capacity to teach and learn altruism, partially due to the influence of culture. Behavior is defined as altruistic or selfish based purely on its observable effect on the chances of survival (or welfare) of the entity involved, regardless of subjective motivations. The chapter provides vivid illustrations of individual selfishness, such as the cannibalistic behavior of blackheaded gulls eating a neighbor's chicks or the female praying mantis consuming her mate, and examples of apparent altruism, like the suicidal sting of a worker bee protecting the colony or a parent bird performing a distraction display to lure a predator away from its nest. Crucially, the argument is made that observed altruism often serves the underlying goal of gene selfishness. The theory of group selection is thoroughly refuted by explaining that any group comprised of self-sacrificing individuals would swiftly be corrupted and taken over by selfish rebels, who are definitionally more likely to survive and reproduce in the short term, outweighing the slow process of group extinction. This erroneous belief in promoting group benefit is shown to mirror common human ethical muddles, extending from patriotism to speciesism, the bias of granting special moral consideration to members of one's own species. The chapter concludes by asserting that the most accurate and insightful way to view evolution is through gene selection, where the fundamental unit of self-interest is the unit of heredity itself.