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Biological evolution is a complex blend of ever changing structural stability, variability and emergence of new phenotypes, niches, ecosystems. We wish to argue that the evolution of life marks the end of a physics world view of law entailed dynamics.
"It’s no exaggeration to suggest that Darwin’s account of speciation is the most revolutionary idea in the last two hundred years. In claiming this, I am not original, for this is also the thesis of Dennett in Darwin’s Dangerous Idea. I will never have words fine enough to capture the greatness of Darwin, but nonetheless it is important to at least attempt the articulation of what is so revolutionary in his thought."
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1) Nature is not supposed to be something. The great and most fundamental Darwinian ontological thesis is that nature is without teleology. In this declaration Darwin continues a long tradition characterized by thinkers such as Democritus, Leucippus, Epicurus, Lucretius, and Spinoza. All of these thinkers, each in their own way, declare that nature is without purpose.
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2) Difference is creative, not deviant. In the old Platonic-Aristotlean-Thomist model of nature, difference was seen as a deviation from form or essence. Organisms were measured or evaluated in terms of how closely they approximated an ideal form of what organisms are supposed to be.
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"Products of intelligent design typically have capabilities that exceed usefulness precisely because these can be “intelligently” engineered, not in order to make the product more useful but in order to make it more impressive. In biological evolution, by contrast, “barely good enough” is the highest level that can be reached, because expense that does not improve overall fitness cannot be tolerated. The “barely good enough” standard is also maintained in biological evolution because species characteristics cannot be redesigned from scratch. Human bipedalism is far less than perfect—consider all those endemic back problems! It is clearly the result of a quadruped design being turned into a biped design rather than having been intelligently designed from scratch. This is exactly the mark of the “blind watchmaker” of natural evolution. But the nonblind watchmakers who intelligently design watches can, and do, redesign from scratch."
"Given the well-known Republican antipathy to evolution, President Obama’s recent description of the Republican budget as an example of “social Darwinism” may be a canny piece of political labeling. "
"The high levels of intelligence seen in humans, other primates, certain cetaceans and birds remain a major puzzle for evolutionary biologists, anthropologists and psychologists. It has long been held that social interactions provide the selection pressures necessary for the evolution of advanced cognitive abilities (the ‘social intelligence hypothesis’), and in recent years decision-making in the context of cooperative social interactions has been conjectured to be of particular importance. Here we use an artificial neural network model to show that selection for efficient decision-making in cooperative dilemmas can give rise to selection pressures for greater cognitive abilities, and that intelligent strategies can themselves select for greater intelligence, leading to a Machiavellian arms race. Our results provide mechanistic support for the social intelligence hypothesis, highlight the potential importance of cooperative behaviour in the evolution of intelligence and may help us to explain the distribution of cooperation with intelligence across taxa."
"Campfire rituals of focused attention created Baldwinian selection for enhanced working memory among our Homo sapiens ancestors. This model is grounded in five propositions: the emergence of symbolism occurred late in the archaeological record; this emergence was caused by a fortuitous genetic mutation that enhanced working memory capacity; a Baldwinian process where genetic adaptation follows somatic adaptation was the mechanism for this emergence; meditation directly affects brain areas critical to attention and working memory; and shamanistic healing rituals were fitness-enhancing in our ancestral past. Each proposition is discussed and defended. Supporting evidence and potential future tests are presented."
"Jaroslav Flegr is no kook. And yet, for years, he suspected his mind had been taken over by parasites that had invaded his brain. So the prolific biologist took his science-fiction hunch into the lab. What he’s now discovering will startle you. Could tiny organisms carried by house cats be creeping into our brains, causing everything from car wrecks to schizophrenia? A biologist’s science- fiction hunch is gaining credence and shaping the emerging science of mind- controlling parasites."
"Some states have introduced education standards requiring teachers to defend the denial of man-made global warming. A national watchdog group says it will start monitoring classrooms."
A tiny number of ideas can go a long way, as we've seen. And the Internet makes that more and more likely. What's happening is that we might, in fact, be at a time in our history where we're being domesticated by these great big societal things, such as Facebook and the Internet. We're being domesticated by them, because fewer and fewer and fewer of us have to be innovators to get by. And so, in the cold calculus of evolution by natural selection, at no greater time in history than ever before, copiers are probably doing better than innovators. Because innovation is extraordinarily hard. My worry is that we could be moving in that direction, towards becoming more and more sort of docile copiers.
"More intelligent people are statistically significantly more likely to exhibit social values and religious and political preferences that are novel to the human species in evolutionary history. Specifically, liberalism and atheism, and for men (but not women), preference for sexual exclusivity correlate with higher intelligence, a new study finds."
"We consider a network of coupled agents playing the Prisoner's Dilemma game, in which players are allowed to pick a strategy in the interval [0,1], with 0 corresponding to defection, 1 to cooperation, and intermediate values representing mixed strategies in which each player may act as a cooperator or a defector over a large number of interactions with a certain probability. Our model is payoff-driven, i.e., we assume that the level of accumulated payoff at each node is a relevant parameter in the selection of strategies. Also, we consider that each player chooses his/her strategy in a context of limited information. We present a deterministic nonlinear model for the evolution of strategies. We show that the final strategies depend on the network structure and on the choice of the parameters of the game. We find that polarized strategies (pure cooperator/defector states) typically emerge when (i) the network connections are sparse, (ii) the network degree distribution is heterogeneous, (iii) the network is assortative, and surprisingly, (iv) the benefit of cooperation is high. "
Though the genetic catalog is now largely complete, we still await many of the anticipated insights, and in Epigenetics: The Ultimate Mystery of Inheritance, Richard Francis, a writer with a biology Ph.D., traces the emergence of a different genetic paradigm. Our DNA shapes who we are, Francis reports from the research forefront, but it is far from a static plan or an inflexible oracle; DNA gets shaped, too. For good or ill, the forces that determine our fate can't be captured by anything so neat as a blueprint.
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