Species evolve exactly as if they were adapting as best they could to a changing world, and not at all as if they were moving toward a set goal.
Interpretation
Species adapt to their environment without a predetermined purpose or goal.
The quote by George Gaylord Simpson emphasizes that evolution is a process driven by the necessity of adaptation to changing environments rather than a directed phenomenon towards a specific endpoint. It suggests that species develop traits and characteristics out of survival instincts, responding to the conditions around them rather than striving for an ideal state or form.
In practice
In a science class discussion about evolution, one might use this quote to illustrate the principle of adaptation.
If a sect does officially insist that its structure of belief demands that evolution be false, then no compromise is possible. An honest and competent biology teacher can only conclude that the sect's beliefs are wrong and that its religion is a false one.
Now we do have many examples of transitional sequences.
He is a state of matter, a form of life, a sort of animal, and a species of the Order Primates, akin nearly or remotely to all of life and indeed to all that is material.
Man is the result of a purposeless and materialistic process that did not have him in mind. He was not planned. He is a state of matter, a form of life, a sort of animal, and a species of the Order Primates, akin nearly or remotely to all of life and indeed to all that is material.
Man is the result of a purposeless and natural process that did not have him in mind
To put it crudely but graphically, the monkey who did not have a realistic perception of the tree branch he jumped for was soon a dead monkey-and therefore did not become one of our ancestors.
Can you imagine, in 2030, taking a space cruise on the very ship that carried the first human beings to Mars? I can't believe that people wouldn't line up for that possibility.
To a synthetic chemist, the complex molecules of nature are as beautiful as any of her other creations. The perception of that beauty depends on the understanding of chemical structures and their transformations, and, as with a treasured work of art, deepens as the subject is studied, perhaps even to a level approaching romance.
The Yankees, the first mechanicians in the world, are engineers - just as the Italians are musicians and the Germans metaphysicians - by right of birth. Nothing is more natural, therefore, than to perceive them applying their audacious ingenuity to the science of gunnery.
Our population and our use of the finite resources of planet Earth are growing exponentially, along with our technical ability to change the environment for good or ill.
In the material sciences these are and have been, and are most surely likely to continue to be heroic days.
In the experimental sciences, the epochs of the most brilliant progress are almost always separated by long intervals of almost absolute repose.
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