Pinker argues that modern science has challenged three "linked dogmas" that constitute the dominant view of human nature in intellectual life: •
The blank slate – the idea that the mind has no innate traits (
empiricism) •
The noble savage – the belief that people are born good and corrupted by society (
romanticism) •
The ghost in the machine – the notion that each person has a soul making choices independent of biology (
dualism) Much of the book is dedicated to examining fears of the social and political consequences of his view of human nature: • "the fear of
inequality" • "the fear of
imperfectibility" • "the fear of
determinism" • "the fear of
nihilism" Pinker claims these fears are
non sequiturs, and that the blank slate view of human nature would actually be a greater threat if it were true. For example, he argues that political equality does not require sameness, but policies that treat people as individuals with rights; that moral progress does not require the
human mind to be naturally free of
selfish motives, only that it has other motives to counteract them; that responsibility does not require behavior to be uncaused, only that it respond to praise and blame; and that meaning in life does not require that the process that shaped the
brain must have a purpose, only that the brain itself must have purposes. He also argues that grounding moral values in claims about a blank slate opens them to the possibility of being overturned by future
empirical discoveries. He further argues that a blank slate is in fact inconsistent with opposition to many social evils since a blank slate could be conditioned to enjoy servitude and degradation. Pinker states that evolutionary and genetic inequality arguments do not necessarily support right-wing policies. For example, if everyone is equal in ability it can be argued that it is only necessary to give everyone equal opportunity. On the other hand, if some people have less innate ability, then redistribution policies should favor those with less innate ability. Further,
laissez-faire economics is built upon an assumption of a
rational actor, while evolutionary psychology suggests that people have many different goals and behaviors that do not fit the rational actor theory. "A rising tide lifts all boats" is often used as an argument that inequality need not be reduced as long as there is growth. Evolutionary psychology suggests that low status itself, apart from material considerations, is highly psychologically stressful and may cause dangerous and desperate behaviors, which suggests that inequalities should be reduced. Finally, evolutionary explanations may also help the left create policies with greater public support, suggesting that people's sense of fairness (caused by mechanisms such as
reciprocal altruism) rather than greed is a primary cause of opposition to welfare, if there is not a distinction in the proposals between what is perceived as the deserving and the undeserving poor. Pinker also gives several examples of harm done by the belief in a blank slate of human nature: •
Totalitarian social engineering. If the human mind is a blank slate completely formed by the environment, then ruthlessly and totally controlling every aspect of the environment will create perfect minds. • Inappropriate or excessive blame of parents since if their children do not turn out well this is assumed to be entirely environmentally caused and especially due to the behavior of the parents. • Release of dangerous
psychopaths who quickly commit new crimes. • Construction of massive and dreary
tenement complexes since housing and environmental preferences are assumed to be culturally caused and superficial. •
Persecution and even mass murder of the successful who are assumed to have gained unfairly. This includes not only individuals but entire successful groups who are assumed to have become successful unfairly and by exploitation of other groups. Examples include
kulaks in the Soviet Union; teachers and "rich" peasants in the
Cultural Revolution; city dwellers and intellectuals under the
Khmer Rouge. ==Reception==