it's lonely out there – the evolutionary explanation for the fermi paradox (redux 12/21/11)

 

Baen | What kick-started intelligence in humans? Given that our powerful brains have so many disadvantages and not much payback in terms of survival, at least in the early stages before technology, why was increasing brain power been selected for, generation by generation, until the evolution of the human mind?

The primary selection pressure is survival but the second is reproductive success: Darwin pointed this out in the Origin of Species. Complex animals reproduce sexually so success involves mating. Vertebrates have complex signalling systems and behavior to persuade another individual to choose them as a suitable partner. This can result in the evolution of anatomical features that are neutral or even disadvantageous to survival. For example, the growth of antlers in deer have a high metabolic cost, offer little survival advantage, but are essential for a male deer to intimidate competitors to win the hooves of fair deer maidens.

The more complicated an organism's reproductive system the more likely the sexes of a species are to have different reproductive strategies, and the mammalian system is very complicated. The best explanation of human intelligence is that it is the result of sexual selection by women. Men tend to be attracted to women who are fit, healthy, young and not yet pregnant (slim waist).

These characteristics are not unimportant to women (well, except the last) but women get stuck with the baby so, given that people are social animals, women are attracted to high status men who will be able to provide support for them and their children. In a social animal, high status revolves around sophisticated interaction, for which intelligence is an advantage because of the need to manipulate, and enjoy good relations with, other members of society.

Even our verbal facility is probably the result of female sexual selection. In British English, boys attempt to "chat up" girls at parties. If women kept selecting for intelligence in men then this would overcome any counter-survival effect of "wasting" resources on high energy brains.

But note that the exact choice of a sexual selection feature is a haphazard process. Women might have selected on developing an oversized red nose, the ability to hop around in a circle with effortless grace, or antlers. Female birds often select on feather coloration patterns and there is evidence that therapod dinosaurs had similar behavior. Bipedal therapods were mostly predators, like wolves or tigers, whereas we are social omnivores and that is probably the key difference.

The take home message is that intelligence is a rather unlikely end result that depends on a conjunction of haphazard ecological and evolutionary features.

Maybe an intelligent species of social therapod dinosaur might still have evolved if the Cretaceous Great extinction had not happened — but major catastrophes from local events up to mass extinctions are a regular feature of life on Earth.

Species survival over time, particularly for a large organism, is to a large extent a matter of sheer luck. We almost didn't make it. About seventy-five-thousand years ago there was a catastrophe, the Toba super-volcanic eruption. The Toba Event seems to have taken human beings to the very brink of extinction. Genetic evidence suggests that we were reduced to between one and ten thousand breeding pairs. All modern humans are genetically closely related, which is why inbreeding is so very dangerous for us.

Toba was a volcanic pinprick compared to the Deccan Traps associated with the Cretaceous great extinction, or the Siberian Traps with the larger Permian extinctions, but it was enough to nearly do for a large animal geographically restricted to Africa. Toba may even have given the kick needed to evolve the human mind and civilization, but our survival was touch and go.

And here, I think, is the explanation for the Fermi Paradox. There does not need to be anything special about Earth or H. sapiens. Applying the Principle of Mediocrity, the universe probably teems with life, quite complex life. But intelligent life is simply unlikely because the evolutionary dice are rigged against it. It is very unlikely that a large complex animal, with the right sexual selection system, will survive long enough for circumstances to kick start the path to a technological civilization.

You don't need a special, unique planet to evolve an intelligent organism. You just need a lot of life on a lot of planets and one or two will win the lottery no matter how unlikely the probability. It's just a matter of random luck. There is nothing special about someone who wins the national lottery.

I suspect it is the "probability of evolving intelligent life" that is the key variable that governs the Drake Equation: the probability must be close to zero. Should we survive long enough to break free of our solar system cradle, the last variable, I suspect we will find life in abundance but will probably never ever meet intellectual peers.

It's going to be lonely out there.

the vast active living intelligence system revisited (redux 4/24/13)

realitysandwich |  For most people, Philip K. Dick (hereafter known as PKD) is best known through films like Blade Runner, Total Recall, Minority Report, and A Scanner Darkly, which were all based on his writings. Classic movies like The Matrix and Vanilla Sky also owe a great debt to PKD's work. What is not so well known is that PKD was a bit of a latter-day mystic, a man who spent the last decade or so of his life struggling to come to terms with a series of visionary experiences (not related to psychedelics) that befell him in the early 1970s. In these experiences, PKD felt as if some vast cosmic intelligence was communicating with him, as if a deity was slipping him secret information. Such was the impact of these theophanies that he chose to incorporate their thematic content into a number of novels as well as an eight-thousand-page exegesis. To the consternation of his peers, PKD began to be not a little obsessed with ideas of "divine invasion" and the like, his last books testifying to his escalating interest in theology and theistic philosophy (interestingly, his last novel, The Transmigration of Timothy Archer, partly concerns the search for a sacred mushroom).

Since his death it has been speculated that PKD suffered from what is known as temporal lobe epilepsy -- a brain disorder that can lead to hallucinatory experiences -- and that this explains his mystical encounters. However, leaving aside the contentiousness of this claim, it does not deal with the burning issue of immediate mystical experience. To label an experience in order to explain it away is to avoid the very real nature of the mystical experience, however it should arise. In fact, as Huxley noted in The Doors of Perception, we should not be surprised if there is always unusual neuronal activity concurrent with a mystical experience, for, as we have seen, modified neuronal firing patterns are related to expanded forms of consciousness. Altered forms of awareness demand altered brain processes, and such a change in brain state can be achieved in many different ways, whether through psilocybin mushrooms, endogenous DMT, yoga, meditation, fasting, or spontaneous epileptic disturbances. Mystical experience is therefore not to be conveniently disposed of with a diagnostic label.

Even before his visionary experiences, PKD had long fought to discover the true nature of reality. It was his pet fascination. In a talk he delivered in the late 1970s, he admitted that for all the years he had thought about the question "what is reality?" he had gotten no further than concluding that reality was that which remained even if you stopped believing in it. Admittedly a thin definition, it is nonetheless indicative that the true nature of reality is not so easily pinned down.

PKD juggled with countless explanations for his mystical experiences. Some involved a Judeo-Christian God, others involved the Logos outlined in some of the Gnostic gospels (these are the "alternative" gospels dug up at Nag Hammadi, Egypt, in 1945), while others even opted for an advanced extraterrestrial intelligence. Whatever the case, PKD was certain that he had been "contacted" by some form of advanced transcendental intelligence-cum-Other.

One of his more enduring theories concerned VALIS, which is an acronym for "vast active living intelligence system," a notion that accords well with our intelligent Other. In the semiautobiographical novel of the same name, VALIS is a hidden entity of immense power and sentience that is in the process of infiltrating our reality by establishing communication with certain individuals. These disclosures are experienced as theophany. For our purposes, the key point is that VALIS is essentially outside of our dimension, but able to penetrate our world. The question arises as to the feasibility that a superior intelligence exists in another dimension with the capacity to move across into ours. This is one of our fanciful options concerning the Other.

music, pattern, and the neurostructures of time (redux 10/18/09)

Noology | The term pattern has recently gained prominence as key term in understanding mankind's quest to make the universe intelligible, to fashion a Cosmos from the pure Chaos of the undiscriminate swarm of photons, electrons, air pressure changes, chemical and physical stimulants, that organisms are exposed to every instant of their living existence. On pattern are based not only the sciences, but also human society, and in the wider sense, life, and the lawfulness of the universe. The present contribution connects Gregory Bateson's work as a recent trailblazer in the recognition of the role of pattern with Goethe's earlier work on Morphology and Metamorphosis. It links this to current scientific understanding of the working of the brain, as neuronal activation patterns, consisting of oscillation fields and logical relation structures of neuronal assemblies, treated formally as coupled dynamic systems and neuronal attractors, which are characterized by their space-time-dynamics. These are called neuronal resonance patterns, and patterns of patterns: metapatterns. Thus, pattern is the "infrastructure" of neuronal processing happening in our brains, below, and a few miliseconds before our working consciousness experiences the "phainomena" and "noumena", of our discernible impressions and thoughts. This spatio-temporal neuronal infrastructure is then re-interpreted in a Neo-Pythagorean way, as the "inner music of the brain", which supports a new validation for the old Pythagorean world views.