Creationists may refuse to acknowledge geologic time scales, and cannot admit that any new organism might be unable to interbreed with the stock from whence it came because their sacred fables say they were “created each after their own kind”. But of course they can’t say what a “kind’ is either, because it’s impossible to identify any point in taxonomy where everything that ever lived isn’t evidently related to everything else. So they largely ignore phylogenetics altogether. Creationists have to deny macroevolution for the same reason they have to deny transitional species, not because these combined realities can only indicate an animal ancestry, but because either one alone proves that such is at least possible, and creationists are not permitted to admit even that.

Creationists insist that macroevolution has never been observed, and the excuse they use to deny that it has requires the addition of a bogus condition that simply does not apply. Creationists argue that evolution can only occur within “definite limits”, and then only to subtle variance within their “kind”. They say new diversity is limited to rare and unviable hybrids between those “kinds”, and they usually say that the emergence of new species is impossible. No “Darwinist” would ever say any of these things.

We don’t believe this because we want to! And why would we want to? We believe it because we can prove it really is true, and that applies to everyone whether you want to believe it or not. We’re not just saying you’ve descended from primates either; we’re saying you are a primate! Humans have been classified as primates since the 1700s when a Christian creationist scientist figured out what a primate was –and prompted other scientists to figure out why that applied to us. It wouldn’t be this way if different “kinds” of life had been magically-created unrelated to anything else; not unless God wanted to trick us into believing everything had evolved. Because the phylogenetic tree of life is plainly evident from the bottom up to any objective observer who dares compare the anatomy of different sets of collective life forms. But it can be just as objectively confirmed from the top down when re-examined genetically. This is why it is referred to as a “twin-nested hierarchy”. But there’s still more than that because the evident development of physiology and morphology can be confirmed biochemically as well as chronologically in geology and developmentally in embryology. Why should that be? And how do creationists explain why it is that every living thing fits into all of these daughter sets within parent groups, each being derived according to apparently inherited traits? They don’t even try to explain any of that, or anything else. They won’t because they can’t, because evolution is the only explanation that accounts for any of this, and it explains it all.

Demanding an “ape-man” is actually just as silly as asking to see a mammal-man, or a half-human, half-vertebrate. How about a half dachshund, half dog? It’s the same thing. One may as well insist on seeing a town half way between Los Angeles and California. Because the problem with bridging the gap between humans and apes is that there is no gap because humans are apes –definitely and definitively. The word, “ape” doesn’t refer to a species, but to a parent category of collective species, and we’re included. This is no arbitrary classification like the creationists use. It was first determined via meticulous physical analysis by Christian scientists a century before Darwin, and has been confirmed in recent years with new revelations in genetics. Furthermore, it is impossible to define all the characters exclusively indicative of every known member of the family of apes without describing our own genera as one among them. Consequently, we can and have proven that humans are apes in exactly the same way that lions are cats, and iguanas are lizards, and whales are mammals. So where is the proof that humans descend from apes? How about the fact that we’re still apes right now!

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Many people think there are no transitional species because the only fossil forms they’re aware of at all are a handful of plastic pieces in a prehistoric play set. They’ve no idea how rich the fossil record is! We know of several hundred species just within dinosaurs, to say nothing of the thousands of examples of each of hundreds more taxa apart from that. Experts estimate that all the collective genera still roaming around now only amount to about 1% of all the species that have ever lived. Practically everything there ever was ain’t no more. Every species living today has definite relatives both extant and extinct, and evident in the fossil record. And in one sense, all of them, even the things still alive, count as transitional species.

No matter what, creationists will not admit that anything we ever find can fulfill Darwin’s prediction of transitional intermediates. This is why creationists demand only monstrous absurdities or issue challenges they know still couldn’t be satisfied no matter how true evolution may be; because they know already that whatever they insist on seeing today we may show them tomorrow, and if that happens, they’ll have to make up new excuses for why it still doesn’t count. So they won’t request to see anything evolution actually requires, and they usually won’t define any criteria they would accept either, because they already know they won’t accept anything even if we show them everything they ever ask for.

When something dies, it is usually disassembled, digested, and decomposed. Only rarely is anything ever fossilized, and even fewer things are very well-preserved. Because the conditions required for that process are so particular, the fossil record can only represent a tiny fraction of everything that has ever lived. Darwin provided many environmental dynamics explaining why no single quarry could ever provide a continuous record of biological events, and why it would be impossible to find all the fossilized ancestors of every lineage. But despite this, he predicted that future generations, -having the benefit of better understanding- would discover a substantial number of fossil species which he called “intermediate” or “transitional” between what we see alive today and their taxonomic ancestors at successive levels in paleontological history. In fact, in the century-and-a-half since then, we’ve found millions of evolutionary intermediaries in the fossil record, much more than Darwin said he could reasonably hope for. There are three different types of transitional forms and we have ample examples of each. But creationists still insist that we’ve never found a single one, because what they usually ask us to present are impossible parodies which evolution would neither produce nor permit.

The evolution of life is analogous to the evolution of language. For example, there are several languages based on the Roman alphabet of only 26 letters. Yet by arranging these in different orders, we’ve added several hundred thousand words to English since the 5th century, and many of them were completely new. The principle is the same in genetics. There are millions of named and classified species of life, all of them based on a variable arrangement of only four chemical components. For another example, we know that Spanish, Italian, French, and Portuguese all evolved from Latin, a vernacular which is now extinct. Each of these newer tongues emerged via a slow accumulation of their own unique slang lingo –thus diverging into new dialects, and eventually distinct forms of gibberish such that the new Romans could no longer communicate with either Parisians or Spaniards. Similarly, if we took an original Latin speaking population and divided them sequestered in complete isolation over several centuries, they might still be able to understand each other, or their jargon may have become unintelligible to foreigners. But they won’t start speaking Italian or Romanian because identical vocabularies aren’t going to occur twice.

Creationists insist that mutations are very rare and are usually, if not always harmful. But the fact is that the vast majority of mutations are completely neutral. They’d have to be because, according to the National Center for Biotechnology Information, there is an overall average of 128 mutations per human zygote! So apparently, in creationist terms, “very rare” means “more than a hundred per person right from the point of conception”. Because those are just the mutations we start out with. Our cells will mutate again 30 more times over the course of our lives, and some of these subsequent mutations can be passed on to our children too –usually with no more effect than those we recognize as family traits.

Most Christians would say that evolution is one of God’s creative methods. But creationists reject that possibility outright, because the issue for them is not whether their God is true; but whether their dogma is true. It can’t be in any case. Even if current concepts of evolution were proven wrong tomorrow, Biblical creationism still couldn’t be true either, because it has already been disproved many times, many ways, and collapses on its own lack of merit. But of course believers can never admit that.

Even before computers existed, we already knew that natural selection can, -and often will- produce results which look like trial-and-error experiments, including elements of seemingly-intentional fine tuning. But for all the implications of apparent design, there is never any indication of any intended goal or final product, nor any hint of infallibility on the part of the designer. In fact, so many errors of so many types are known that even if there was an unnatural architect using miraculous means instead of natural ones, then it seems that entity must either be blind and barely competent, or there are whole teams of designers working on separate lines competing against each other.

Evolution does depend on mutations, and these do appear to be random. But each cumulative mutation may become significant factors for that organism once pitted against the dynamics of the environment in which they are introduced. Thus natural selection isn’t random; it’s deterministic. Many creationists will even admit this. And as some computer models have already shown, natural selection can actually even exceed the skills of human designers. In fact, natural selection can be so deterministic that it often leads to innovations which some perceive as evidence of intelligent design, and which even rationalists describe as though modified for intended benefit. Whether it is deliberately guided or not, there is definitely a system of design. But there doesn’t actually have to be any apparent intent or intelligence involved.

Abiogenesis has a decent amount of evidence behind it, but nowhere near as much as evolution does. So far we still don’t know which (if any) of the explanations posed for the origin of life is the most accurate one. But if there’s one thing the wisdom of the ages has taught us, it is that simply not yet knowing the real explanation is no reason to go and blame anything on magic. Besides, even if a god did appear and summon the first life into being billions of years ago, there is no question but that life has certainly evolved since then, and is still evolving now.

Creationists often cite the laws of Thermodynamics as if they could somehow apply to the diversification of life on earth. They don’t. Lord Kelvin, the scientist who discovered those laws was a creationist himself. He was definitely opposed to evolution. But even he said that thermodynamics demands that the earth would still have to be on the order of twenty to forty million years old at least, even if the bowels of the world didn’t continue to heat themselves radioactively, which of course they do, and that pushes the age back much further.

Creationists habitually misdefine their terms, and commonly insist that evolution means “life from non-life”. But of course that’s not right either. Evolution explains how life diversifies, not how it began. Since evolution at every level is -by definition- limited to the variation of allele frequencies inherited over generations of living organisms, then it obviously can’t operate where no genomes yet exist. The evolutionary process starts with genetics and can’t start before it.