Dean Hamer, while working in his laboratory at the National Institute of Health, made headlines around the world when he discovered a genetic link to male homosexuality. From such notoriety comes this book, the essence of which is that ones behavior is much more a function of nature/genetics than it is of nurture or whether mother's dominance warped you for life. Hamer goes through the effects of your genetics as it relates to your personality; your propensity to seek thrills; your tendencies toward aggression, anger and violence; your capacity for addiction; your needs in regard to sex and love; your body weight and eating habits; your rate of aging; and your emotional temperament. And, guess what? The odds are about 70% genetic and 30% upbringing and character as to how you'll turn out as an adult. This book doesn't try to mystify the reader and is, in fact, easy to read. Hamer weaves in the stories of individuals in order to keep the reader glued to each individual's saga. The sine qua non comes with the twin studies. They've multiplied over the years and today offer an abundant body of proof in support of Hamer's assertions. The factual evidence is overwhelming in favor of genetics as the deciding factor in behavior. Read it and you will see.This book was published in 1998 which makes it quite old in the rapidly moving world of genetic research. Let me give you an example of what has happened in the interim. Not only have genes for fear and confidence been revealed, but a gene or constellation of genes has been posited for one's proclivity for belief in a higher order being, God. The Darwinian selection for such a trait comes from man's need to organize and work together in groups, in arduous circumstances, over long periods of time. Wow? I knew that profound unshakeable belief had to be genetic after talking to so many "true believer" anti-war protestors. The whole concept gives a new slant to Eric Hoffer's classic, "the True Believer". I've written often about man's seeming infinite capacity for self deception, but now I have, presto, a genetic component where none was available prior. The other half of this juxtaposition is man's inexhaustible need to feel morally virtuous, a way of puffing one's self-importance or so it seems from here. After you read this book, and if you've never read much on the genetic influences on your behavior, you might see yourself and many of your friends in a completely different light. I really enjoyed the experience of reading what Hamer has to say, and I believe you will too.
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