Did Christianity Give Us Science?

Almost everyone knows the story before they know any of the facts. Faith and science are old enemies, locked in a long war: the church against Galileo, superstition against the telescope, dogma dragging its heels while the light of reason advances. It is one of the most confident assumptions a modern person carries, absorbed from cartoons and textbooks long before anyone reads a page of history. And it has a curious feature. The men who actually founded modern science — Copernicus the cathedral canon, Kepler the would-be minister turned astronomer, Galileo the devout Catholic, Newton writing theology by candlelight — would not have recognised the war they are supposed to have fought. Nearly all of them believed they were studying nature because it was the handiwork of God, and several of them said so in print — Newton in the closing pages of the Principia itself.

That disconnect is not a curiosity at the edge of the subject; it is the subject. Over the last half-century, historians of science — including many with no religious stake at all — have largely abandoned the “warfare” picture as bad history. This essay is about how that picture was built, why the specialists tore it down, and what the more interesting truth turns out to be. It is a historical claim, made carefully, and it will not prove that Christianity is true. It will suggest something smaller and, once seen, hard to unsee: that the supposed enemies were, for most of their history, closer to family.

The war that was invented

The “conflict thesis” is not ancient. It has a birthday, an author, and a sequel. In 1874 the American chemist John William Draper published History of the Conflict between Religion and Science, a bestseller that cast the whole of Western history as a running battle between free inquiry and (chiefly Roman Catholic) faith.¹ Two decades later the founding president of Cornell University, Andrew Dickson White, gave the thesis its monument: A History of the Warfare of Science with Theology in Christendom (1896), two fat volumes of the church forever obstructing progress.² These books were enormously influential. They are also, as history, largely wrong — and specialists now say so bluntly. The thesis’s imagery is older than either book: in 1820 Thomas Jefferson, complaining of clerical opposition to his new University of Virginia, wrote that the priests of the different sects “dread the advance of science as witches do the approach of day-light.”³

The correction is not a fringe Christian complaint; it is the mainstream of the discipline. The historian Ronald Numbers — himself no apologist for religion — edited a landmark collection, Galileo Goes to Jail and Other Myths about Science and Religion, in which twenty-five scholars dismantle the set-piece stories one by one, from the flat-earth legend to the claim that the church banned human dissection.⁴ A more recent volume, The Warfare between Science and Religion: The Idea That Wouldn’t Die, edited by Jeff Hardin, Numbers, and Ronald Binzley, traces how a thesis the experts reject has survived so stubbornly in the popular mind.⁵ The title says it all: the warfare model persists not because the evidence supports it but because it is a useful story. The Christian writer Glen Scrivener suggests one reason it has proved so useful: it retells, in secular dress, an older Christian story of a bringer of light opposed by the priests — the very picture Jefferson painted.⁶ As the historian James Hannam and others have shown at book length, the actual medieval and early-modern record is one of deep entanglement, not combat.⁷ One influential alternative framework, John Hedley Brooke’s, has been dubbed the “complexity thesis”: there is no single relationship between science and religion to be told as conflict or as harmony, only many particular entanglements, each to be studied in its own setting — a verdict that tells as much against a tidy Christian success story as against the warfare myth.⁸ Historians are wary of every tidy slogan here — and that wariness is exactly what makes their verdict on the warfare thesis worth trusting.

Why science was born here — the careful version

If the two were not at war, a harder question follows. Modern experimental science — the self-sustaining, self-correcting enterprise of hypothesis, measurement, and law — took hold decisively in Christian Europe of the sixteenth and seventeenth centuries. Why there and then? This is contested ground, and it must be stated with care: historians do not treat Christianity as a sufficient explanation, and the strong slogan “no Christianity, no science” overreaches badly. But a more modest thesis has real scholarly support. Historians such as Reijer Hooykaas and Peter Harrison have argued that certain theological convictions supplied intellectual preconditions that made the scientific enterprise thinkable.⁹

Three convictions in particular. The first is a free Creator. If God made the world by choice rather than necessity, then the world is contingent — it could have been otherwise — and you cannot deduce its workings by pure reason from your armchair, as the Greeks so often tried. You have to go and look. Hooykaas, building on the philosopher Michael Foster, argued that this “voluntarist” picture of God underwrote the empirical turn: nature must be interrogated, not merely contemplated—though Harrison has cautioned that the link is looser than that thesis claims.¹⁰ The second is an intelligible, ordered creation, made by a rational God and open to the minds of creatures made in his image. This is a historical and theological precondition, not a proof of design — the deeper puzzle of why the cosmos is mathematically intelligible at all is taken up in this Library’s essay on the laws of nature. The third, easily missed, is human fallibility. If the fall reaches the reasoning mind, then the individual thinker is not to be trusted alone; knowledge must be checked, replicated, and disciplined against self-deception. Harrison has traced how the doctrine of the fall shaped the experimental method itself, in Francis Bacon and the early Royal Society, as a remedy for a corrupted intellect.¹¹

None of this sprang from nowhere in 1600. It rested on a long medieval lineage that the “Dark Ages” caricature erases. The universities — Bologna, Paris, Oxford — were a Christian invention with no exact precedent, and they institutionalised exactly the culture of open, rule-governed argument that science needs. Medieval natural philosophers did real work: John Philoponus in the sixth century criticised Aristotle’s physics and anticipated the idea of impetus; Jean Buridan and Nicole Oresme in the fourteenth pressed it toward inertia and even entertained a rotating earth; Robert Grosseteste and Roger Bacon pioneered the study of optics and experiment.¹² It was the philosopher Alfred North Whitehead — no orthodox believer — who put the point most sharply: the very “faith in the possibility of science” that the early scientists took for granted was, he wrote, “an unconscious derivative from medieval theology” and its insistence on the rationality of God.¹³

The Galileo affair, without the myth

And now the trump card. If the warfare thesis has one battle it can always name, it is Galileo — and honesty requires meeting it head-on, conceding what must be conceded. In 1616 the Roman Inquisition’s theologians judged the claim that the sun stands still to be “foolish and absurd in philosophy, and formally heretical,” and Copernicus’s book was suspended on the Index; in 1633 Galileo was tried, made to abjure his view, and confined to house arrest for the rest of his life.¹⁴ This was a real injustice and a real error. The Roman Catholic authorities were wrong to condemn him, wrong to bind the interpretation of Scripture to a particular astronomy, and wrong to silence a man for being, as it turned out, right. No Christian account worth reading pretends otherwise. The Catholic Church has itself acknowledged part of this: in 1992, receiving the conclusions of a Vatican commission that had re-examined the case, Pope John Paul II told the Pontifical Academy of Sciences that the majority of the theologians of Galileo’s day did not “recognize the formal distinction between Sacred Scripture and its interpretation.”¹⁵ Whitewashing the episode would forfeit exactly the honesty this whole case depends on.

But the clean fable of enlightened science versus benighted faith does not survive contact with the details. Start with the science itself. In 1616 the evidence did not yet favour Copernicus. His 1543 system still used perfect circles and a thicket of epicycles, and it predicted the planets no better than the old Ptolemaic model; and Tycho Brahe’s geo-heliocentric system fit the same observations—including the phases of Venus—while keeping the earth still. There was as yet no stellar parallax, and the physics of a moving earth was unsolved.¹⁶ Even the physical proof of the earth’s motion that Galileo set out in the final day of his 1632 Dialogue, an account of the tides, was mistaken: it ignored the apparent correlation between the tides and the moon’s position, and could not match the tides’ daily timing.¹⁷ Heliocentrism won the field only later, as Kepler’s ellipses (published 1609, slow to win acceptance) proved their worth and Newton’s gravity (1687) explained them. In 1616 the church sided with the scientific majority of the day — which is not a defence of the verdict, but it does explode the idea that faith was simply refusing an obvious fact. The conflict, as the leading Galileo scholar Maurice Finocchiaro observes, ran across both institutions: progressives and conservatives in the church and in the academy alike, not a tidy front of religion against reason.¹⁸ Jesuit astronomers at the Collegio Romano confirmed Galileo’s telescopic observations; his fiercest opponents included secular Aristotelian professors. The Orthodox writer David Bentley Hart, surveying the same record, calls the affair less a war of science against faith than a collision of egos, personality, and politics — and, awkwardly for the legend, in 1616 it was often the churchmen asking for proof and Galileo asking for assent to a model not yet demonstrated.¹⁹ That does not exonerate the church: its error was not caution but jurisdiction — it converted a legitimate scientific reservation into a charge of heresy and bound the reading of Scripture to it. The other name the legend invokes, Giordano Bruno, burned in 1600, does not change the picture: Bruno was condemned chiefly for a cluster of charges the Inquisition judged heretical — among them denying the Trinity, the divinity of Christ, and transubstantiation — not for Copernicanism as such; his cosmology of innumerable worlds did figure among the accusations, and how much weight it carried is debated, but Bruno was no working astronomer and his trial was not about evidence for a moving earth.⁴

Tellingly, both sides of the dispute could appeal to the same authority on how to read Scripture: Augustine, who had warned twelve centuries earlier that Christians must not make the Bible contradict what reason and observation establish about the natural world, lest they discredit the faith before unbelievers.²⁰ Galileo quoted that very principle. Nor was resistance to a moving earth a Roman peculiarity: Philip Melanchthon, Luther’s colleague at Wittenberg, rejected it as contrary to Scripture in his 1549 textbook of physics, even as his own circle put Copernicus’s mathematics to work — Rheticus had urged the book into print, and Erasmus Reinhold built his Prutenic Tables (1551) on it.²¹ The lesson the episode actually teaches, then, is double-edged, and it cuts against everyone. It rebukes a faith that overreaches its competence and clings to a scientific claim as though the gospel depended on it. And it rebukes the warfare myth that turns one Italian tragedy into a law of history. One thing it is not is a weapon for one branch of the church against another: the error was the Roman authorities’ of that moment, and the honest response is neither anti-Catholic point-scoring nor Protestant self-congratulation, but a shared caution against ever again mistaking the science of the hour for the word of God.

The founders’ own faith

What the legend most obscures is the piety of the scientists themselves. Nicolaus Copernicus was a canon of Frombork cathedral, and he dedicated On the Revolutions of the Heavenly Spheres (1543) to Pope Paul III. Johannes Kepler, who had trained for the Lutheran ministry, understood his astronomy as an act of worship — in a phrase long associated with him, the scientist’s task was to think God’s thoughts after him.²² Galileo, a believing Catholic to the end, argued in his 1615 Letter to the Grand Duchess Christina that God had written two books, Scripture and nature, and that they could not finally conflict because both had the same Author; he approvingly cited a cardinal’s quip that the Bible was meant “to teach us how one goes to heaven, not how the heavens go.”²³ He was defending Copernicanism as a Christian, insisting that good science and true faith answer different questions.

And Isaac Newton closed the greatest scientific book ever written — the Principia — not with an equation but with a doxology. “This most beautiful system of the sun, planets, and comets,” he wrote in the General Scholium, “could only proceed from the counsel and dominion of an intelligent and powerful Being.”²⁴ (Newton’s private theology was in fact heterodox — he privately rejected the Trinity — a reminder that these were individuals, not a party line, and that the argument here needs no one to have been orthodox.) The point is not that their faith proved their physics, nor that they were all orthodox; it is simply that the caricature is false. The people who built modern science were not straining against their religion. Most of them were expressing it.

What this shows — and what it doesn’t

Two honest limits keep this argument where it belongs. First, the thesis that Christian theology supplied the preconditions of science is a claim about history, and a contested one; historians rightly resist any monocausal story, and Numbers’s own Galileo Goes to Jail counts “that Christianity gave birth to modern science” among its myths, a caution against replacing the old warfare story with a triumphalist inverse.⁴ Take it, then, as the careful historians offer it: not that Christianity single-handedly manufactured science, but that its picture of a rational, contingent, intelligible creation was fertile soil in which the enterprise could take root and last. Second, science was never a solely Christian achievement. It stands on Greek mathematics and logic, and on the Islamic Golden Age, when scholars in Baghdad, Cairo, and Córdoba preserved and advanced Greek learning, founded algebra as a discipline, and — in Ibn al-Haytham’s optics — pioneered controlled experiment centuries before Europe.²⁵ That story is told, and defended, in this Library’s companion essay on Islam and science; the case here neither needs nor claims a Christian monopoly.

And — this matters most — none of it shows Christianity is true. That a worldview proved intellectually fruitful is not proof that it is correct; good and true are different things, and the case for the faith rests not on what it built but on whether Jesus rose from the dead, which is argued on its own evidence elsewhere in this Library. What the history does dissolve is a barrier: the widespread assumption that a thinking person must choose between the laboratory and the church. The founders of the one were, overwhelmingly, members of the other — which, in a Europe where nearly everyone was baptised, would prove little on its own; what matters is that so many of them said, in their own writings, that faith was their reason for looking.

Conclusion: the enemy that never was

The warfare between science and religion is not a fact discovered by historians. It is a story popularised by two nineteenth-century writers, embraced because it flattered an age, and quietly retired by the scholars who checked it. In its place stands something stranger and better documented: a scientific revolution midwifed in the most Christian civilisation the world had seen, by men who prayed as they calculated, and who thought — rightly or wrongly — that in reading the book of nature they were reading a second scripture from the same hand. The Galileo affair is a genuine scar, and it should be owned without flinching. But one scar is not a war. The next time someone says science and faith are ancient enemies, the honest reply is that the war is the modern invention — and that the people who actually gave us the telescope’s discoveries, the laws of motion, and the ellipse would have found the whole quarrel bewildering.