“It is no surprise that debates over nature and nurture evoke more rancor than just about any issue in the world of ideas.” In this quotation, Steven Pinker—author of four award-winning books on biological determinism—comments on an issue that has confounded people for centuries. This, of course, is the argument of whether “nature” or “nurture” dictates our traits and behaviors. In this instance, nurture connotes the environmental factors that influence one’s character. Nature represents the idea that heredity is the principle determinant of human traits. The phrase’s etymology is quite interesting; first coined by Francis Galton, it was probably taken from Shakespeare’s The Tempest: “A devil, a born devil, on whose nature / Nurture can never stick.” Many believe that at birth, the human mind is a tabula rasa—a “blank slate”—and that most traits are adopted during one’s life. To the contrary, many others believe that a person’s traits and behavior are preordained by heredity. In my honest opinion, such a categorically partisan decision cannot be logically made. Several aspects of a person’s character have been scientifically proven to be caused by ancestry; conversely, some skills and mannerisms are quite clearly acquired during a person’s development. Most common, however, are the traits that are governed by both genetics and environment. In his essay entitled Why Nature & Nurture Won’t Go Away, Pinker cogently argues his position that nature is the primary influence on one’s characteristics. In the essay, he also attempts to dislodge the “nurture” argument and the “mixture-of-both” argument. Yet, I stand by that latter opinion. No one could possibly be so bold as to refute either nature or nurture, not even Steven Pinker. Clearly, genes and environmental signals equally contribute to behavior.
There are some traits that are purely hereditary. However, most of these clear-cut traits are physiological, having to do with the body. Examples of genetically controlled traits include vulnerability to diabetes, eye color, and ear lobe detachment—things that are usually static after birth (excepting plastic surgery of course). Environment does not have any imminent effect on these hereditary traits. Another relatively clear-cut trait is religion. Statistically, most children adopt the religious ideals of their parents. Even after the natural stage of doubt that comes with adolescence, most people will return to their parents’ religious preferences in adulthood. This parent-child influence practically defines the “nurture” argument. Parent-child religious trust is something that can only be established during development. Even if a person decides to observe a different religion than that of his parents, the “nurture” argument is still being proven: it suggests a lack of trust and reinforcement, or a desire for independence. In Pinker’s words, children do not wish “to surrender to their parents’ attempts to shape them.” This struggle is engendered only after birth, not in the womb. Pinker claims: “Virtually everyone concludes that the behavior of the parent causes the outcomes in the child. The possibility that the correlations may arise from shared genes is usually not even mentioned, let alone tested.” I have two responses to this statement: First, the parent’s behavior usually does cause the outcome of the child (unless they live apart from each other). And second, parent-to-child gene transfer has been proven to affect their similarities, yet religious belief is different. Religious agreement is not a behavioral “correlation,” it is a matter of ethics.
Most characteristics, however, are more complex, usually including genetic influence and environmental influence. The simplest examples of this would be weight and skin color, which rely both on genes and on environment. A more complex example would be language. Pinker writes: “Children exposed to a given language acquire it equally quickly regardless of their racial ancestry. Though people may be genetically predisposed to learn language, they are not genetically predisposed, even in part, to learn a particular language; the explanation for why people in different countries speak differently is 100 percent environmental.” Again, Pinker puts all of his trust on one side of argument and not the other. It is true, that people are not genetically predisposed to learn a particular language. However, the main point is that people do have a predisposition to learn languages in general. Pinker actually mentions this, and then dismisses it as unimportant! This predisposition allows human beings to have great versatility in terms of learning languages—Why should the particular language matter at all? Therefore, “100 percent environmental” is a false assumption; a child’s language education is partly influenced by heredity, and partly by environment. (One must be wary when reading from Pinker. He often attempts to dispel criticism by using phrases like “100 percent.” Do not be fooled!)
Another interesting case of the nature vs. nurture debate would be free will. Do people really control their own decisions? Are a person’s choices genetically preordained, or are they shaped by his environment? Can people really be blamed for how they act? This argument cannot be backed by scientific data, but rather, must be discussed philosophically. In 1924, Nathan Leopold and Richard Loeb murdered a 14-year-old boy, and were caught red-handed. Their lawyer, trying desperately to win the case, broached the topic of free will: “this terrible crime was inherent in his organism, and it came from some ancestor… Is any blame attached because somebody took Nietzsche’s philosophy seriously and fashioned his life upon it? … it is hardly fair to hang a 19-year-old boy for the philosophy that was taught him at the university.” According to the lawyer, the boys’ decision to commit the crime was influenced by radical environmental forces. An opposing argument would have been that Leopold and Loeb were born to be cruel and vicious, and that they therefore deserved to be locked away in prison.
While only a few traits apply to either nature or nurture, most belong to both at once. The fact that environmental forces actually trigger genetically-based reactions reinforces this theory. Heredity and developmental experience work in sync with each other; therefore, it is erroneous to say that dominance belongs to one or the other. If the question of nature vs. nurture was asked of me, I would reply that the answer is “a fair mixture of both.”
1 Shakespeare, The Tempest.
Bibliography : 1)) http://en.wikipedia.org/wiki/Nature_versus_nurture 2)) Pinker, Why Nature & Nurture Won’t Go Away, 2004 3)) Gould, The Politics of Biological Determinism, 1999