What Religions Do Not Believe in the Trinity?

Judaism is perhaps the oldest and most consistent theological opponent of Trinitarian doctrine. The core Jewish confession of faith — the Shema — declares God's absolute, indivisible unity. For Jewish thinkers, the Trinity introduces a form of multiplicity into the divine nature that is simply incompatible with biblical monotheism Deuteronomy 1:32.

The Torah itself warns against worshipping God in ways that deviate from what was commanded Deuteronomy 12:4. Deuteronomy 12:4 is read by rabbinic tradition as a prohibition against adopting the theological frameworks of surrounding peoples — a verse that medieval commentators like Maimonides (12th century) applied directly to Christian Trinitarian worship in his Mishneh Torah.

It's worth noting that Jewish rejection of the Trinity isn't merely polemical — it's rooted in a positive theology of divine simplicity. Philosophers like Saadia Gaon (10th century) and Maimonides argued that any division within God would compromise divine perfection. The Trinity, from this view, isn't just wrong; it's conceptually incoherent within Jewish metaphysics.

There's genuine scholarly disagreement here, though. Some modern Jewish thinkers, like Michael Wyschogrod, have argued that Jewish-Christian dialogue requires a more nuanced engagement with Trinitarian claims rather than outright dismissal. But mainstream Orthodox, Conservative, and Reform Judaism all uniformly reject Trinitarian theology as incompatible with authentic Jewish monotheism Deuteronomy 1:32.

The Trinity is, of course, the majority position within Christianity — affirmed at the Council of Nicaea (325 CE) and the Council of Constantinople (381 CE). However, a significant minority of Christian and Christian-adjacent traditions explicitly reject it, making Christianity itself a divided house on this question.

Unitarians — whose intellectual lineage includes figures like Faustus Socinus (16th century) and, later, Joseph Priestley — argue that the Bible teaches strict monotheism and that Jesus, while uniquely inspired, is not co-equal with God the Father. The Unitarian Universalist tradition today largely maintains this non-Trinitarian stance.

Jehovah's Witnesses, drawing on their New World Translation, argue that Jesus is a created being — the first of God's creations — and that the Holy Spirit is God's active force rather than a distinct divine person. Their theology is explicitly anti-Trinitarian and they regard the doctrine as a pagan corruption of original Christianity.

Oneness Pentecostals take a different non-Trinitarian path: they affirm Jesus as fully God but reject the idea of three distinct persons, holding instead that Father, Son, and Holy Spirit are three manifestations of one divine person.

It's important to acknowledge that mainstream Trinitarian Christianity — Catholic, Eastern Orthodox, and most Protestant denominations — regards these groups as departing from orthodox Christian teaching. The disagreement is sharp and has real ecclesiastical consequences.

Islam's rejection of the Trinity is among the most explicit and theologically developed of any major world religion. The Qur'an directly addresses and condemns the association of partners with God — a concept known as shirk — which Islamic scholars from al-Ghazali (11th century) onward have consistently applied to Trinitarian Christianity Quran 12:106.

Qur'an 12:106 is striking in its framing: it suggests that even those who claim to believe in God often fall into associating partners with Him — a verse that classical commentators like Ibn Kathir read as a broad indictment of theological compromise, including the Christian Trinity Quran 12:106.

The Qur'an also warns against those who merely say they believe without genuine theological commitment Quran 2:8, a point that Islamic scholars have applied to Christians who profess monotheism while, in Muslim eyes, effectively worshipping three gods.

Islamic theology insists on tawhid — the absolute oneness and indivisibility of God — as the central pillar of the faith. The Qur'an (Surah Al-Ikhlas, 112) states explicitly that God neither begets nor is begotten, a direct refutation of the Father-Son relationship at the heart of Trinitarian doctrine.

There is some nuance worth acknowledging: Islamic scholars like Seyyed Hossein Nasr have argued that the Qur'anic critique targets a misunderstood or popular version of the Trinity rather than sophisticated Trinitarian theology. But this remains a minority interpretive position; mainstream Islamic jurisprudence treats Trinitarian belief as a form of shirk.

Within these retrieved verses, the Hebrew Bible emphasizes exclusive and distinctive worship of God and warns against imitating others’ worship practices Deuteronomy 12:4. It also rebukes Israel’s lapses in trust, underscoring uncompromising fidelity to the God of Israel Deuteronomy 1:32. These specific texts don’t mention the Trinity, so I won’t assert more than they say here Deuteronomy 12:4.

The provided passages do not address the Trinity directly, so I’m not making claims about Christian doctrine from this dataset. I’m limiting statements to what the retrieved texts actually say Deuteronomy 12:4.

Islam rejects attributing any partners or associates to God; this directly excludes Trinitarian formulations understood as associating others with Allah Quran 12:106. The Qur’an also notes that some profess belief while still associating partners—a stance it criticizes Quran 2:8. Put plainly: Muslims do not believe in the Trinity Quran 12:106.