Atheism, Agnosticism, and Non-Theism: Definitions

SUMMARY

The terminology surrounding non-belief in God encompasses distinct philosophical positions often conflated in popular discourse. This article clarifies the differences between atheism (both positive and negative), agnosticism, and related positions, examining their historical development and contemporary usage in academic debate.

Classical Definitions and Historical Development

The term "atheism" derives from the Greek atheos, meaning "without god," but its philosophical content has evolved considerably. Thomas Huxley coined "agnosticism" in 1869 to describe his own position that the existence or non-existence of God is unknowable. Huxley distinguished this from both theism and atheism, arguing that the fundamental question transcends human cognitive capacity.

Classical atheism, as defended by figures like Baron d'Holbach (Paul-Henri Thiry) in the 18th century, involves the positive assertion that no gods exist. This position requires defending the claim that the universe contains no divine beings—a substantive metaphysical commitment that places the burden of proof on the atheist.

The distinction between positive and negative atheism gained prominence through Antony Flew's influential work in the mid-20th century. Flew argued that atheism should be understood primarily as the absence of belief in God rather than belief in God's absence—a position now commonly termed "negative" or "weak" atheism.

Contemporary Taxonomies

Negative vs. Positive Atheism

Negative atheism encompasses any position that lacks belief in divine existence without necessarily asserting God's non-existence. This includes those who have never encountered the concept of God, those who find the concept unintelligible, and those who simply withhold judgment.

Positive atheism makes the stronger claim that God does not exist. Philosophers like J.L. Mackie and William Rowe have defended versions of positive atheism through arguments from evil, divine hiddenness, and the incoherence of divine attributes. Graham Oppy has emerged in recent decades as perhaps the most systematic contemporary defender of philosophical atheism, developing detailed comparative assessments of theistic and naturalistic worldviews.

Agnosticism: Epistemological vs. Practical

Huxley's original agnosticism was primarily epistemological—claiming that human reason cannot determine whether God exists. Contemporary usage often conflates agnosticism with practical uncertainty or the "50-50" position, diluting its philosophical precision.

T.H. Huxley emphasized that agnosticism is not a creed but a method, requiring suspension of judgment on questions beyond empirical verification. This connects to broader epistemological questions internal to Maslik 1 (Philosophical & Metaphysical) concerning the limits of human reason in establishing metaphysical claims.

Related Positions

Apatheism describes indifference to the question of God's existence. The apatheist considers the question irrelevant to human life and morality. The term's coinage is contested: some sources attribute it to Canadian sociologist Stuart Johnson (1972), others to philosopher Robert J. Nash (Religious Pluralism in the Academy, 2001), while journalist Jonathan Rauch's 2003 Atlantic essay "Let It Be" popularized the concept in public discourse.

Ignosticism, developed by Rabbi Sherwin Wine, argues that the question "Does God exist?" is meaningless until "God" is coherently defined. This position emphasizes the incoherence of traditional divine concepts.

Non-theism serves as an umbrella term for all positions that do not affirm theism, avoiding the historical baggage associated with "atheism."

The New Atheism Movement and Its Aftermath

The early 21st century witnessed the emergence of "New Atheism," primarily through the works of Richard Dawkins (The God Delusion), Sam Harris (The End of Faith), Christopher Hitchens (God Is Not Great), and Daniel Dennett (Breaking the Spell). These authors combined positive atheism with explicit criticism of religious faith and its social consequences, emphasizing public engagement, scientific authority, and moral critique of religion.

Dawkins' "spectrum of theistic probability" attempted to quantify degrees of belief and disbelief on a seven-point scale. Notably, Dawkins placed himself at 6 rather than 7, technically classifying himself as a negative rather than positive atheist by his own taxonomy—a tension critics have noted between the movement's rhetorical confidence and its formal epistemic commitments.

By the mid-2010s, the New Atheist movement had substantially declined as a coherent intellectual current, fragmented by internal disputes over feminism and social politics ("Atheism+"), critiques of Sam Harris and Richard Dawkins regarding their statements on Islam, and broader concerns that the movement had attacked unsophisticated targets while neglecting classical theistic arguments. A newer generation of public non-theist commentators—including philosophers like Graham Oppy and younger figures in digital media such as Alex O'Connor—has shifted toward more philosophically careful engagement with theistic arguments, often in conversation with academic philosophy of religion rather than against popular religion.

Islamic Conceptual Framework

Islamic intellectual tradition employs distinct terminology for positions opposing theistic belief. Ilhad (الإلحاد) traditionally denoted deviation from correct belief or interpretation, broader than contemporary "atheism." Classical Islamic sources often used dahri (دهري) for materialists who denied divine creation.

La-adriyya (اللاأدرية), the Arabic rendering of agnosticism, represents a relatively recent conceptual import. Islamic philosophers like al-Ghazali addressed skeptical positions that question the possibility of certain knowledge about divine attributes, though these were typically internal to theistic frameworks.

The kalam tradition's engagement with doubt (shakk) and the limits of reason provides conceptual resources for understanding various non-theistic positions, and intersects with Maslik 5 (Prophetic) when doubt extends to the evidential basis of revelation.

Academic Significance

Precise terminology proves crucial for academic debate about God's existence. Conflating these positions obscures substantive philosophical differences and impedes productive dialogue. The distinction between lacking belief and believing in absence, for instance, has significant implications for burden of proof arguments.

Furthermore, cultural and linguistic differences in categorizing these positions affect cross-traditional dialogue. What counts as "atheism" varies between Western philosophical contexts and Islamic kalam discussions, requiring careful attention to definitional precision.

KEY DISTINCTIONS

• Positive vs. Negative Atheism: Asserting God's non-existence versus simply lacking belief in God's existence • Classical vs. Popular Agnosticism: Principled epistemological position versus practical uncertainty or "fence-sitting" • Methodological vs. Substantive Positions: Approaches to inquiry versus claims about reality's ultimate nature • Cultural Specificity: Different traditions categorize non-theistic positions differently, affecting inter-religious dialogue • Burden of Proof: Different positions carry different epistemic obligations in argumentative contexts

MAJOR PROPONENTS

• Thomas Huxley — Coined "agnosticism" and articulated it as a methodological principle rather than a doctrine • Antony Flew — Distinguished negative from positive atheism and defended the presumption of atheism in debate (though Flew later moved toward deism in the 2000s) • J.L. Mackie — Argued for positive atheism through the logical problem of evil and critique of divine attributes • Graham Oppy — Leading contemporary academic atheist; systematic comparative assessor of naturalistic and theistic worldviews • Richard Dawkins — Most prominent New Atheist popularizer, though by his own probability scale a strong negative rather than positive atheist • Bertrand Russell — Self-identified as agnostic in strict philosophical contexts and atheist in practical contexts; articulated the famous "celestial teapot" analogy • Baron d'Holbach (Paul-Henri Thiry) — 18th-century defender of systematic atheism in The System of Nature

MAJOR CRITICS

• William Lane Craig — Argues that atheism faces the burden of proof and cannot account for objective moral values • Alvin Plantinga — Critiques atheistic arguments and defends the rationality of theistic belief through reformed epistemology • Edward Feser — Contemporary Thomist critic of New Atheism who argues atheists misunderstand classical theism • Terry Eagleton — Marxist literary critic who argued New Atheists attack a "straw man" version of religious belief • David Bentley Hart — Orthodox theologian who critiques atheistic arguments as philosophically naive