General introduction contextualizes research presented in the project and presents the three main conversation partners that are taken into account. First, it explains crucial stages of the development of evolutionary theory – from Darwin’s proposal, through the neo-Darwinian contribution and the two stages of the twentieth century evolutionary synthesis, until the most recent expanded evolutionary synthesis. Second, it lists foundational categories in the Aristotelian-Thomistic metaphysics that become relevant in the context of contemporary evolutionary biology. Finally, it refers to the classical theology of creation as grounding a constructive model of the most up-to-date Thomistic version of theistic evolution that will be developed in the book. Introduction ends with a general plan of the project.

John Gould’s father was a gardener. A very, very good one – good enough to be head of the Royal Gardens at Windsor. John apprenticed, too, becoming a gardener in his own right at Ripley Castle, Yorkshire, in 1825. As good as he was at flowers and trees, birds became young John Gould’s true passion early in life. Like John Edmonstone, John Gould (1804–1881) adopted Charles Waterton’s preservation techniques that kept taxidermied bird feathers crisp and vibrant for decades (some still exist in museums today), and he began to employ the technique to make extra cash. He sold preserved birds and their eggs to fancy Eton schoolboys near his father’s work. His collecting side-hustle soon landed him a professional post: curator and preserver of the new Zoological Society of London. They paid him £100 a year, a respectable sum for an uneducated son of a gardener, though not enough to make him Charles Darwin’s social equal (Darwin initially received a £400 annual allowance from his father plus £10,000 as a wedding present).

Darwin claimed that On the Origin of Species, or the Preservation of Favoured Races in the Struggle for Life was only an “abstract” of that much longer book he had begun to write in 1856, after his irreverent meeting with J. D. Hooker, T. H. Huxley, and T. V. Wollaston, and Lyell’s exasperated encouragement in May. But he never completed that larger book. Instead, he worked on plants and pigeons and collected information through surveys from other naturalists and professional specimen hunters like Alfred Russel Wallace for the better part of a decade.

For all their scientific prowess and public renown, there is no comparable Lyell-ism, Faraday-ism, Einstein-ism, Curie-ism, Hawking-ism, or deGrasse-Tyson-ism. So, there must be something even more powerful than scientific ideas alone caught in the net of this ism attached to Darwin. And whatever the term meant, it’s fair to say that Darwinism frightened Bryan.

Historian Everett Mendelsohn was intrigued. In the middle of writing a review of an annual survey of academic publications in the History of Science, he marveled that an article in that volume contained almost 40 pages’ worth of references to works on Darwin published in just the years between 1959 and 1963. Almost 200 works published in a handful of years – no single figure in the history of science commanded such an impressive academic following. Yet Mendelsohn noted that, paradoxically, no one had written a proper biography of Darwin by 1965. Oh sure, there was commentary. Lots of commentary. But so many of the authors were retired biologists who had a tendency toward hagiography or, the opposite, with axes to grind.

Meeting the “White Raja of Sarawak” in Singapore in 1853 had been a stroke of luck. Honestly, it could have been a major turning point in what had been an unlucky career so far for 30-year-old collector Alfred Russel Wallace (1823–1913) (Figure 4.1). But the steep, rocky, sweaty climb up Borneo’s Mt. Serembu (also known as Bung Moan or Bukit Peninjau) in the last week of December 1855 wasn’t exactly what Wallace expected. His eyeglasses fogged in the humidity. Bamboo taller than buildings crowded the narrow path. Near the top, the rainforest finally parted. But it revealed neither a temple nor some sort of massive colonial complex with all the trappings of empire worthy of a “raja.” Instead, there leaned a modest, very un-colonial-ruler-like white cabin. When he saw it, Wallace literally called it “rude.”

Charles Darwin spent nearly the whole of his writing career attempting to convince his colleagues, the general public, and, by extension, you and me, that change occurs gradually. Tiny slivers of difference accumulate over time like grains of sand in a vast hourglass. Change happens, in other words. It’s painfully slow, but it’s inevitable. By implication, two organisms that look different enough to us to be classified as separate species share, many tens of thousands or even millions of generations back, the same ancestors. (Inbreeding means we don’t even need to go back quite that many generations to demonstrate overlap, but you get the point.) But change that gradual means, as Darwin himself well recognized, that looking for “missing links” would be a pretty silly errand. Differences between one generation and the next look to our eyes just like common variation. It’s one grain falling from the top of the hourglass to the bottom. You can’t perceive the change. You would have to go back in time to find the very first individuals who possessed a particular trait – bat-like wings, say, or human-ish hands – and then, turning to their parents, you would see something almost identical.

Transmutation. “Evolutio,” if you wanted to be fancy and Italian about it. Whatever you want to call it, the grand unrolling of one type into another, connecting all living things into a single tree of life was all the rage among the society gentlemen. James Burnett, Lord Monboddo, an influential Scottish judge in the 1700s, had said shocking things about it. Monboddo’s metaphysics separated humans from brutes by only the thinnest slice of cognition. And imagine how he scandalized the chattering classes when, according to rumor anyway, he suggested perhaps tails even lingered, dangling from the spinal cords of the underdeveloped. They called him an “eccentric,” a fusty, argumentative judge and a voracious reader. Perhaps too learned – genius and madness, you know.

The Good News finally snagged him. In late September 1881, he was near the end, bedridden, languishing in a soft purple robe, still able to read, though he always preferred to be read to. Lady Hope entered the drawing room at the top of the stairs quietly, respectfully, as the golden hour gently illuminated corn fields and English oak forests through his picturesque bay window. The faintest crown of white hair encircled his head in the late afternoon light; the rest was wizardly beard (Figure 6.1). Lady Hope, the well-known evangelist, was visiting the Darwins, and she approached the old scientist cautiously. But she needn’t have. In his wrinkled hands he held the Bible, open to the New Testament Epistle of Hebrews. “The Royal Book,” Darwin called it, serenely, mentioning a few favored passages.

The stone is still there in the garden. That’s what gets me. It’s not the house itself – houses decay slowly and can be preserved pretty easily, especially in Britain where even an eighteenth-century country house is not “old.” It’s not even the tree behind the house, alive when Charles Darwin still lived in his Down House, now propped up by guywires against inevitable collapse as a kind of totem of the great naturalist’s existence. If you leave the rear exit, the one that takes you to Darwin’s preserved greenhouse and the stunning flora on a pretty path lined in that particular English way of making the perfectly manicured seem somehow “natural,” you might glance to the left and see behind a small iron fence a one-foot-wide stone. A round mill stone or pottery wheel, it was, or appears to have been.

we have a moral code that meshes with Christianity, why then are we so often non-social and why do we so blatantly disobey the dictates of Jesus Christ? “Love your enemies, bless them that curse you, do good to them that hate you, and pray for them which despitefully use you, and persecute you” (Matthew 5:43–4). Think about it. The Great War (later called the First World War), 1914–1918, between (depending how you count) 20 and 40 million dead. The Second World War, 1939–1945, 60 to 80 million dead. The Russian Civil War, 1917–1922, 5 to 10 million dead. The Chinese Civil War, 1927–1949, 10 million dead. And so it goes. We are not yet at the pogroms, from the Turks killing Armenians, Stalin and the Kulaks, Hitler and the Jews, down to Rwanda and the killing of the Tutsis, not to mention half a million women raped as a preliminary to grotesque mutilation of genitals.

“Just the facts, ma’am. Just the facts!” This famous directive by Sergeant Joe Friday – apparently never actually made in this form – is from the television series Dragnet. Unfortunately, while this may be adequate for detecting and solving crime, not so elsewhere. The idea that science is simply a matter of recording empirical experience is hopelessly inadequate and misleading. Science is about empirical experience, but it is about such experience as encountered and interpreted – and with effort and good fortune – as explained by us.

Let us return to the address to the American Association for the Advancement of Science given in 1967 (later published in Science), by medieval historian Lynn White Jr. He threw down the gauntlet. The son of a Presbyterian minister and himself a lifelong active Presbyterian, White felt nevertheless that his religion had given rise to much that needed answering. “Christianity bears a huge burden of guilt.” White’s thesis is relatively straightforward. Modern science and technology – and the appalling environmental consequences – are the children of the Christian faith. But we get ahead of ourselves. Let’s plunge right into looking at some of these environmental consequences, using as our exemplar the most pressing environmental issue of them all: global warming.

Remember: “Let us make mankind in our image, in our likeness, so that they may rule over the fish in the sea and the birds in the sky, over the livestock and all the wild animals, and over all the creatures that move along the ground” (Genesis 1:26). It is there right at the beginning of the Old Testament; it is also in the New. We are unique and hence have a position superior to other animals. In the Sermon on the Mount, Jesus reaffirms this. “Behold the fowls of the air: for they sow not, neither do they reap, nor gather into barns; yet your heavenly Father feedeth them. Are ye not much better than they?” (Matthew 6:26).

Ask the basic question: Can a Christian be an organicist? And respond with the basic answer: Yes! There are Christians who welcome the idea of an organic Earth, at the least. Thomas Berry, a Catholic priest no less, had a theological vision of the world that made the organic thesis central. “The universe is not a vast smudge of matter, some jellylike substance extended indefinitely in space.

Evolution was both known and generally accepted very rapidly after the Origin. Darwinism, even. In the summer of 1860, Charles Dickens’ widely read weekly, All the Year Round, carried two anonymously published articles on the theme of the Origin (with a third early in the next year).

Evolution was the dominant tradition of the nineteenth century. Yet its understanding changed greatly from the Great Chain of Being to unilinear (one path), universal (a wide path), and multilinear (many paths) evolutionism, and to the neo-Darwinism of recent times.

Rapid evolution can be observed happening in nature when selection is unusually strong. We are all familiar, these days, with the evolution of antibiotic resistance in bacteria and the evolution of pesticide resistance in insects. Less familiar, but also very rapid, is the evolution of resistance to heavy metals in populations of plants that have adapted to growing on the spoil-heaps surrounding zinc and lead mines. These cases of unusually strong selection and consequently rapid evolution are all associated with human modification of the environment. The classic case study of evolution happening – industrial melanism in moths – also fits into this category.

Evo-devo has come a long way since its origins a mere four decades ago. Many exciting things have been discovered, and there will be many more discoveries to come in the years ahead. I have tried, in this book, to give you a flavour of this new branch of science. Here, I summarize what I think are its most important conclusions so far and the most important challenges that lie ahead.