What are the Ash'ari, Maturidi, and Athari theological traditions in Sunni Islam?

Sunni Islam has three widely-recognized mainstream theological (kalam) traditions, alongside the four schools of law. The Ash'ari and Maturidi schools are systematic traditions that emerged in the ninth and tenth centuries through the work of Abu al-Hasan al-Ash'ari in Iraq and Abu Mansur al-Maturidi in Central Asia, both of whom defended core Islamic doctrines using structured rational argument in response to philosophical and theological currents of the time. The Athari (traditionalist) school, tied closely to the Hanbali school of law and associated with scholars such as Ahmad ibn Hanbal and, in modern times, Ibn Taymiyyah and Muhammad ibn Abd al-Wahhab, instead affirms the divine attributes mentioned in the Quran and Sunnah as they appear, without detailed rational interpretation or asking "how" (a stance often summarized as bila kayf) — favoring the wording of the earliest generations (the salaf) over the later, more philosophically-engaged method used by the other two. All three affirm God's absolute oneness (tawhid) and transcendence, echoing the Quranic statement that there is nothing like unto Him, while differing on method: how much to engage philosophical/rational argument when addressing questions such as the nature of God's attributes, the relationship between divine decree and human free will, and the createdness or eternity of divine speech. Ash'ari theology became especially associated with the Shafi'i and Maliki schools of law, Maturidi theology with the Hanafi school, and Athari theology with the Hanbali school — the Athari approach is also the official theological orientation of Saudi Arabia's religious establishment today. All three are considered legitimate, mainstream expressions of Sunni belief; the differences between them are debated among scholars but are not treated as differences over Islam's core creed itself.

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