The Determination of Human Behaviour
The nature versus nurture debate has spanned over decades, and is becoming more heated in the recent years. Following the mapping of the human genome, scientists are pursuing the possibility of controlling human behaviour such as homicidal tendencies or insanity through the manipulation of genes. Is this possible for us to ensure that humans behave in certain ways under certain circumstances in future?
This is highly doubtful, as the determination of human behaviour depends not only on genes (nature), but also on the environment (nurture). It is usually the "joint product of genes and environment", one of the first principles in Leda Cosmides and John Tooby in "Evolutionary
Psychology: Nature and Nurture" (attached). This remains our group's thesis.
Introduction
Take for example this Calvin and Hobbes strip.
We assume that duplication is the same as cloning and therefore the two Calvins are genetically similar. Hobbes (that is the tiger) implies in the last frame that the two are similar in behaviour. Ignoring the absurdity, it brings us to a question: Do genetically similar people behave the same way? That is, can nature alone determine how one behaves?
This seems quite impossible. Take another fictitious, but thought-provoking, example in
Mowgli, from "The Jungle Book" by Rudyard Kipling. He is genetically similar to all human beings and much less so to wolves, bears and panthers, but he behave more like the wild animals. In this case, it is certainly clear that nature alone cannot determine human nature. The environment makes a difference.
Behaviour genetics
Behaviour genetics is the study of the extent to which heredity (genes) influence human behaviour. Genes are found in chromosomes which are made up of deoxyribonucleic acid
(DNA). Our DNA strand determines not only our physical characteristics (known to some as our genetic architecture) but also our