The science-religion conflict viewpoint holds that science and religion are fundamentally and necessarily in opposition - that the methods, truth claims, and institutional histories of the two are irreconcilable, and that the advance of scientific knowledge has been, is, and will continue to be impeded by religious belief. Holders of this view argue that Galileo's 1633 trial before the Roman Inquisition is not an anomaly but a paradigm case: when religious authority and empirical inquiry collide, religion will predictably suppress the latter to protect the former. This position is most common among secular philosophers, prominent scientists, and the organized atheist and skeptic communities.

Conflict viewpoint advocates argue that science and religion rely on fundamentally incompatible methods of arriving at truth. Science, they hold, requires evidence, falsifiability, and revision in light of new data. Religion, by contrast, grounds belief in revelation, scripture, tradition, and authority - sources that are immune to empirical refutation by design. The philosopher W.K. Clifford's dictum - “it is wrong always, everywhere, and for anyone, to believe anything upon insufficient evidence” - is frequently invoked as a statement of the underlying epistemological demand.¹⁾ Richard Dawkins extends this into a broader critique, arguing that faith - defined as belief without evidence - is not merely epistemically defective but actively dangerous because it trains the mind to accept claims without demanding justification.²⁾

Advocates point to a long record of religious institutions suppressing or distorting scientific inquiry. The Galileo affair is the most cited instance: Galileo Galilei was condemned by the Roman Catholic Inquisition for defending the Copernican heliocentric model, placed under house arrest, and his Dialogue Concerning the Two Chief World Systems (1632) was placed on the Index of Forbidden Books.³⁾ They also cite the condemnation of Giordano Bruno (burned at the stake in 1600, partly for cosmological heterodoxy), the long resistance of established churches to Darwinian evolution, and ongoing political efforts in the United States to introduce creationism or intelligent design into public school science curricula as evidence of a continuous pattern rather than a series of isolated incidents.

The conflict view regards the reception of Darwinian evolution as the clearest modern demonstration of the thesis. Charles Darwin's On the Origin of Species (1859) directly contradicted the Genesis account of special creation and the fixity of species. The response from many religious quarters was immediate and hostile. Conflict viewpoint advocates point to the 1925 Scopes Trial in Tennessee, the repeated legal battles over creationism and intelligent design in American public schools (Edwards v. Aguillard, 1987; Kitzmiller v. Dover, 2005), and persistent polling data showing large fractions of the American public rejecting evolution as evidence that religion continues to obstruct scientific literacy.⁴⁾

The conflict viewpoint has a formal historiographical pedigree. John William Draper's History of the Conflict Between Religion and Science (1874) and Andrew Dickson White's A History of the Warfare of Science with Theology in Christendom (1896) gave the thesis its canonical form: the history of Western civilization is, in significant part, a history of ecclesiastical interference with the growth of knowledge.⁵⁾⁶⁾ Though later historians of science have challenged the accuracy of the Draper-White thesis in specific cases, conflict viewpoint advocates hold that the broad pattern survives the debunking of particular details.

Beyond epistemology and history, advocates argue that the conflict is also sociological. Religious institutions wield political power and use it to shape science education, restrict research (notably on embryonic stem cells and, they argue, reproductive medicine), and influence the appointment of regulators. In the United States, they point to the George W. Bush administration's restrictions on federally funded embryonic stem cell research (2001) as a direct case of theology overriding scientific judgment about research priorities.⁷⁾

The conflict thesis in its modern form originates with the 19th-century professionalization of science and the resulting contest between natural philosophers (soon to be called scientists) and clerical authorities over who held the right to explain natural phenomena. Before this period, most investigators of nature in the Western tradition operated within a broadly Christian framework - but conflict viewpoint advocates argue this reflects institutional necessity rather than genuine harmony.

The Draper-White framework dominated popular understanding through the early 20th century. It was absorbed into the self-understanding of the organized freethought and secularist movements, which became important vehicles for disseminating the conflict narrative to a broad public.

The late 20th and early 21st centuries saw a revival of the conflict thesis under the banner of the New Atheism. Following the September 11, 2001 attacks, a cluster of authors - Richard Dawkins, Sam Harris, Daniel Dennett, and Christopher Hitchens, collectively dubbed the “Four Horsemen” - brought the conflict thesis to mass audiences, emphasizing both the epistemological defects of faith and what they argued was the direct harm caused by religious belief when it intersects with political power.⁸⁾⁹⁾

• Richard Dawkins (b. 1941) - Evolutionary biologist and author of The Selfish Gene (1976) and The God Delusion (2006). Dawkins is the most prominent contemporary advocate of the conflict view, arguing that religion and science compete for the same explanatory space and that science consistently wins.

• Sam Harris (b. 1967) - Neuroscientist and philosopher. Harris argues in The End of Faith and Letter to a Christian Nation (2006) that religious moderation, not only fundamentalism, is epistemically indefensible and socially corrosive.

• Daniel Dennett (1942-2024) - Philosopher at Tufts University. Dennett's Breaking the Spell (2006) applied a naturalistic, evolutionary framework to religion itself, treating it as a phenomenon to be explained rather than a partner in inquiry.

• Christopher Hitchens (1949-2011) - Journalist and polemicist. God Is Not Great synthesized historical, literary, and moral arguments for the conflict thesis, emphasizing what Hitchens saw as religion's record of atrocity and obscurantism.

• John William Draper (1811-1882) - Chemist and historian. His 1874 History of the Conflict gave the thesis its first systematic historical form.

• Andrew Dickson White (1832-1918) - Historian and co-founder of Cornell University. White's Warfare of Science with Theology (1896) remains a foundational text, though conflict viewpoint advocates often acknowledge its historical inaccuracies while defending its broad thesis.

• Steven Weinberg (1933-2021) - Nobel laureate in physics. Weinberg argued that religious belief offers false comfort that impedes clear-eyed understanding: “The more the universe seems comprehensible, the more it also seems pointless.”¹⁰⁾

• Jerry Coyne (b. 1949) - Evolutionary biologist at the University of Chicago. Coyne's Faith Versus Fact: Why Science and Religion Are Incompatible (2015) is among the most systematic recent defenses of the conflict thesis.¹¹⁾

Within the conflict camp, there is meaningful disagreement about the strength and scope of the incompatibility claim. Strong incompatibilists (Dawkins, Coyne) hold that science and religion address the same domain of factual claims about reality, and that religion's claims are therefore simply false in the way any empirical claim can be false. Weak incompatibilists, or methodological critics, argue more narrowly that religious epistemology is unreliable and that institutional religion has a bad track record, without necessarily claiming that every possible religious belief is directly falsified by science.

Some in the conflict camp, influenced by cognitive science of religion (Pascal Boyer, David Sloan Wilson, though the latter is more accommodationist), treat religion primarily as a natural phenomenon explicable by evolutionary psychology - a byproduct of cognitive tendencies like agent detection. This view tends to undercut strong incompatibilist claims somewhat, since it explains religious belief without requiring it to be in direct propositional competition with science. Dennett occupies a middle position here.

The New Atheist wing has been criticized from within the broader secular community for tactical reasons - some secularists argue that aggressive conflict rhetoric hardens religious resistance and makes scientific communication harder. Steven Pinker and others associated with “Enlightenment liberalism” tend to defend a strong secular and scientific worldview while questioning whether confrontational anti-theism is the most effective approach. This is a strategic disagreement, not a philosophical one about the underlying incompatibility.

• Dialogue Concerning the Two Chief World Systems - Main topic
• Compatibility Viewpoint - The view that science and religion address different domains and need not conflict (NOMA and related positions)
• Theistic Evolution Viewpoint - The view that evolutionary science is compatible with theistic belief
• History - Historical development of the science-religion relationship
• Debate - Central points of contention
• History of Science Consensus - Scholarly consensus on the accuracy of the Draper-White conflict thesis
• United States History