Two chemicals called actin and myosin evolved eons ago to allow the muscles in insect wings to contract and relax. Thus, insects learned to fly. When one of those paired molecules are absent, wings will grow but they cannot flap and are therefore useless. Today, the same two proteins are responsible for the beating of the human heart, and when one is absent, the person’s heartbeat is inefficient and weak, ultimately leading to heart failure.Again, science marvels at the way molecules adapt over millions of years, but isn’t there a deeper intent? In our hearts, we feel the impulse to fly, to break free of boundaries. Isn’t that the same impulse nature expressed when insects began to take flight? The prolactin that generates milk in a mother’s breast is unchanged from the prolactin that sends salmon upstream to breed, enabling them to cross from saltwater to fresh.

Religion is an attempt to get control over the sensory world, in which we are placed, by means of the wish-world, which we have developed inside us as a result of biological and psychological necessities. But it cannot achieve its end. Its doctrines carry with them the stamp of the times in which they originated, the ignorant childhood days of the human race. Its consolations deserve no trust. Experience teaches us that the world is not a nursery. The ethical commands, to which religion seeks to lend its weight, require some other foundations instead, for human society cannot do without them, and it is dangerous to link up obedience to them with religious belief. If one attempts to assign to religion its place in man’s evolution, it seems not so much to be a lasting acquisition, as a parallel to the neurosis which the civilized individual must pass through on his way from childhood to maturity.

The history of man proves that religion perverts man's concept of life and the universe, and has made him a cringing coward before the blind forces of nature.If you believe that there is a God; that man was 'created'; that he was forbidden to eat of the fruit of the 'tree of knowledge'; that he disobeyed; that he is a 'fallen angel'; that he is paying the penalty for his 'sins,' then you devote your time praying to appease an angry and jealous God.If, on the other hand, you believe that the universe is a great mystery; that man is the product of evolution; that he is born without knowledge; that intelligence comes from experience, then you devote your time and energies to improving his condition with the hope of securing a little happiness here for yourself and your fellow man.That is the difference.If man was 'created,' then someone made a grievous mistake.

Historians are wont to name technological advances as the great milestones of culture, among them the development of the plow, the discovery of smelting and metalworking, the invention of the clock, printing press, steam power, electric engine, lightbulb, semiconductor, and computer. But possibly even more transforming than any of these was the recognition by Greek philosophers and their intellectual descendants that human beings could examine, comprehend, and eventually even guide or control their own thought process, emotions, and resulting behavior. With that realization we became something new and different on earth: the only animal that, by examining its own cerebration and behavior, could alter them. This, surely, was a giant step in evolution. Although we are physically little different from the people of three thousand years ago, we are culturally a different species. We are the psychologizing animal.

If about a dozen genera of birds had become extinct or were unknown, who would have ventured to have surmised that birds might have existed which used their wings solely as flappers, like the logger-headed duck (Micropterus of Eyton); as fins in the water and front legs on the land, like the penguin; as sails, like the ostrich; and functionally for no purpose, like the Apteryx. Yet the structure of each of these birds is good for it, under the conditions of life to which it is exposed, for each has to live by a struggle; but it is not necessarily the best possible under all possible conditions. It must not be inferred from these remarks that any of the grades of wing-structure here alluded to, which perhaps may all have resulted from disuse, indicate the natural steps by which birds have acquired their perfect power of flight; but they serve, at least, to show what diversified means of transition are possible.

Recall the metaphor I used in chapter 4 relating the random movements of molecules in a gas to the random movements of evolutionary change. Molecules in a gas move randomly with no apparent sense of direction. Despite this, virtually every molecule in a gas in a beaker, given sufficient time, will leave the beaker. I noted that this provides a perspective on an important question concerning the evolution of intelligence. Like molecules in a gas, evolutionary changes also move every which way with no apparent direction. Yet we nonetheless see a movement toward greater complexity and greater intelligence, indeed to evolution’s supreme achievement of evolving a neocortex capable of hierarchical thinking. So we are able to gain an insightinto how an apparently purposeless and directionless process can achieve an apparently purposeful result in one field (biological evolution) by looking at another field (thermodynamics).

The male frog, in mating season," said Crake, "makes as much noise as it can. The females are attracted to the male frog with the biggest, deepest voice because it suggests a more powerful frog, one with superior genes. Small male frogs - it's been documented - discover that if they position themselves in empty drainpipes, the pipe acts as a voice amplifier, and the small frog appears much larger than it really is.""So?""So that's what art is, for the artist," said Crake. "An empty drainpipe. An amplifier. A stab at getting laid.""Your analogy falls down when it comes to female artists," said Jimmy. "They're not in it to get laid. They'd gain no biological advantage from amplifying themselves, since potential mates would be deterred rather than attracted by this sort of amplification. Men aren't frogs, they don't want women who are ten times bigger than them.""Female artists are biologically confused," said Crake.

Many textbooks point out that no animal has evolved wheels and cite the fact as an example of how evolution is often incapable of finding the optimal solution to an engineering problem. But it is not a good example at all. Even if nature could have evolved a moose on wheels, it surely would have opted not to. Wheels are good only in a world with roads and rails. They bog down in any terrain that is soft, slippery, steep, or uneven. Legs are better. Wheels have to roll along an unbroken supporting ridge, but legs can be placed on a series of separate footholds, an extreme example being a ladder. Legs can also be placed to minimize lurching and to step over obstacles. Even today, when it seems as if the world has become a parking lot, only about half of the earth's land is accessible to vehicles with wheels or tracks, but most of the earth's land is accessible to vehicles with feet: animals, the vehicles designed by natural selection.

Living organisms were not independently created, but have descended and diversified over time from common ancestors. And thus, no other biological theory so elegantly explains this. Evolutionary theory has withstood the test of time—by way of vicarious experimentation, observation, analysis, and relentless criticism, though opposing viewpoints still cling to the concept of "design." As a person of the biological sciences, I cannot subscribe to such misguided notions that suggest static biological states. Clearly, proper examination of the natural world reveal evolutionary trajectories—some random, others nonrandom—and all having observable genetic implications. It is only when we apply evolutionary explanations to living systems that it becomes ever so clear. The world was not specifically designed with us in mind, but rather we long since adapted and conformed to our surroundings, only giving it the illusionary appearance of "design.

The essential quality that an entity needs, if it is to become an effective gene vehicle, is this. It must have an impartial exit channel into the future, for all the genes inside it. This is true of an individual wolf. The channel is the thin stream of sperms, or eggs, which it manufactures by meiosis. It is not true of the pack of wolves. Genes have something to gain from selfishly promoting the welfare of their own individual bodies, at the expense of other genes in the wolf pack. A bee-hive, when it swarms, appears to reproduce by broad-fronted budding, like a wolf pack. But if we look more carefully we find that, as far as the genes are concerned, their destiny is largely shared. The future of the genes in the swarm is, at least to a large extent, lodged in the ovaries of one queen. This is why — it is just another way of expressing the message of earlier chapters — the bee colony looks and behaves like a truly integrated single vehicle.

Let us accept the possibility that there is, at death, not an abrupt cessation of energy, rather a dispersal. This seems more than reasonable to me. Mind you, I've owned a series of old cars, and I"m used to turning off the motor only to experience a series of rumblings and explosions that would shame many a volcano. This is the sort of thing I'm conceptualizing, a kind of clunky running-on. And just as some cars are more susceptible to this behavior, so people vary in the length of time, and the force with which, their energy sputters and gasps. . . My example is overly dramatic, but it is not wholly unreasonable, and it serves to make this genetic mutation a player at the evolutionary table. You see what I'm getting at: a biologically and evolutionally sound model for the soul. (I didn't say I'd achieved it.) Let's conceive of the soul as an aura that human beings wear on their backs, cumberson as a tortoise's carapace. Some are larger than others.

...I suspect everyone there can reason along the lines I described...It's just that when it comes to evolution, and especially to the related realization that we are all pretty small bits of the universe, it seems as though Ham and his followers just can't handle the truth. They throw aside their common sense and cling to the hope that there's something that makes it okay to *not* think for themselves.""The irony is, in the process they are walking away from our ability to understand who we are, where we came from, and how we fit into a cosmos...If there is something divine in our nature, something that sets humans apart from all creatures, surely our ability to reason is a key part of it. The irony is, in the process they are walking away from our ability to understand who we are, where we came from, and how we fit into a cosmos...If there is something divine in our nature, something that sets humans apart from all creatures, surely our ability to reason is a key part of it.

With theology as a code of dogmas which are to be believed, or at any rate repeated, under penalty of present or future punishment, or as a storehouse of anaesthetics for those who find the pains of life too hard to bear, I have nothing to do; and, so far as it may be possible, I shall avoid the expression of any opinion as to the objective truth or falsehood of the systems of theological speculation of which I may find occasion to speak. From my present point of view, theology is regarded as a natural product of the operations of the human mind, under the conditions of its existence, just as any other branch of science, or the arts of architecture, or music, or painting are such products. Like them, theology has a history. Like them also, it is to be met with in certain simple and rudimentary forms; and these can be connected by a multitude of gradations, which exist or have existed, among people of various ages and races, with the most highly developed theologies of past and present times.

One reason might be that if I hadn't tripped, I'd have been hamburger.When this sort of thing occurs, people often say that there was some power greater than themselves at work. This sounds reasonable. I am just suggesting that it is not necessary to equate "greater than ourselves" with "stretched across the heavenly vault." It could mean "just slightly greater." A cocoon of energy that we carry with us, that is capable, under some conditions, of affecting physicality. Furthermore, I conjecture that the totality of all these souls is what constitutes the Godhead. I mean this in the same sense as the "Leviathan" of Thomas Hobbes, whereby man, that is everyone together, creates "that great Leviathan called a Commonwealth or State, which is but an artificial man, though of greater statute and strength than the natural, for whose protection and defense it was created."And that leads me to my Insight: God was not there at the beginning of evolution; God is what lies at the end of it.

Though we became experimental creatures of our own devising, it’s important to bear in mind that we had no inkling of this process, let alone its consequences, until only the last six or seven of our 100,000 generations. We have done it all sleepwalking. Nature let a few apes into the lab of evolution, switched on the lights, and left us there to mess about with an ever-growing supply of ingredients and processes. The effect on us and the world has accumulated ever since. Let’s list a few steps between the earliest times and this: sharp stones, animal skins, useful bits of bone and wood, wild fire, tame fire, seeds for eating, seeds for planting, houses, villages, pottery, cities, metals, wheels, explosives. What strikes one most forcefully is the acceleration, the runaway progression of change - or to put it another way, the collapsing of time. From the first chipped stone to the first smelted iron took nearly 3 million years; from the first iron to the hydrogen bomb took only 3,000.