Wikipedia's first sentence called it “secret society of muslim philosophers in basra”. Today it says “secret society active during the reign of the buyid dynasty”.
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Machine-checked against the full current article on 2026-08-03.
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The opening as it read in 2025
Medieval secret society of Muslim philosophers This article is about a group of Iraqi polymaths. Double-leaf frontispiece from the " Encyclopedia of the Brethren of Purity ", Süleymaniye Library , Baghdad , 1287. The Brethren of Purity ( Arabic : إخوان الصفا , romanized : Ikhwān Al-Ṣafā ; also The Brethren of Sincerity ) were a secret society of Muslim philosophers in Basra , Iraq , in the 9th or 10th century CE. The structure of the organization and the identities of its members have never been clear. Their esoteric teachings and philosophy are expounded in an epistolary style in the Encyclopedia of the Brethren of Purity ( Rasā'il Ikhwān al-Ṣafā' ), a giant compendium of 52 epistles that would greatly influence later encyclopedias. A good deal of Muslim and Western scholarship has been spent on just pinning down the identities of the Brethren and the century in which they were active. They are generally considered a secret society because of their closed and private meetings every 12 days, as mentioned in the Rasa'il . (1960), "On the Ethics of the Brethren of Purity", The Muslim World , 50: 109–121. نور, مكتبة.
This is Wikipedia's own text, saved in our repository. Their copy of it is revision 1280422496.
The opening as it stood in 2010
Arabic manuscript illumination from the twelfth century CE showing the Brethren of Purity. The Brethren of Purity ( Arabic : اخوان الصفا ; transliteration : Ikhwan al-Safa ; also in English : The Brethren of Sincerity ) were a secret society of Muslim philosophers in Basra , Iraq , in the 10th century CE , when Basra was the seat of the Abbasid Caliphate . The structure of this mysterious organization and the identities of its members have never been clear. Their esoteric teachings and philosophy are expounded in an epistolary style in the Encyclopedia of the Brethren of Purity (Arabic: Rasa'il Ikhwan al-safa' ), a giant compendium of 52 epistles that would greatly influence later encyclopedias. A good deal of Muslim and Western scholarship has been spent on just pinning down the identities of the Brethren and the century in which they were active. They are generally considered a secret society because of their closed & private meetings every 12 days, as mentioned in the Rasa'il .
Red text was written in or rewritten since the previous snapshot. Their copy is revision 370337700.
The opening as it stood in 2015
Arabic manuscript illumination from the 12th century CE showing the Brethren of Purity.maqamat al hariri The Brethren of Purity ( ikhwãn al-safã ; also The Brethren of Sincerity ) were a secret society of Muslim philosophers in Basra , Iraq , in the 8th century CE. The structure of this mysterious organization and the identities of its members have never been clear. Their esoteric teachings and philosophy are expounded in an epistolary style in the Encyclopedia of the Brethren of Purity ( Rasa'il Ikhwan al-safa' ), a giant compendium of 52 epistles that would greatly influence later encyclopedias. A good deal of Muslim and Western scholarship has been spent on just pinning down the identities of the Brethren and the century in which they were active. They are generally considered a secret society because of their closed & private meetings every 12 days, as mentioned in the Rasa'il .
Red text was written in or rewritten since the previous snapshot. Their copy is revision 662901908.
The opening as it stood in 2020
Arabic manuscript illumination from the 12th century CE showing the Brethren of Purity. The Brethren of Purity ( ; also The Brethren of Sincerity ) were a secret society of Muslim philosophers in Basra , Iraq , in the 8th or 10th century CE. The structure of this mysterious organization and the identities of its members have never been clear. Their esoteric teachings and philosophy are expounded in an epistolary style in the Encyclopedia of the Brethren of Purity ( Rasa'il Ikhwan al-safa' ), a giant compendium of 52 epistles that would greatly influence later encyclopedias. A good deal of Muslim and Western scholarship has been spent on just pinning down the identities of the Brethren and the century in which they were active. They are generally considered a secret society because of their closed and private meetings every 12 days, as mentioned in the Rasa'il . (1960), "On the Ethics of the Brethren of Purity", The Muslim World , 50: 109–121.
Red text was written in or rewritten since the previous snapshot. Their copy is revision 960829989.
The opening as it stood on October 6, 2023 1 passage from the previous snapshot no longer appear
Medieval secret society of Muslim philosophers This article is about a group of Iraqi polymaths.Double-leaf frontispiece from the " Encyclopedia of the Brethren of Purity ".Süleymaniye Library The Brethren of Purity ( ; also The Brethren of Sincerity ) were a secret society of Muslim philosophers in Basra , Iraq , in the 9th or 10th century CE.The structure of the organization and the identities of its members have never been clear. Their esoteric teachings and philosophy are expounded in an epistolary style in the Encyclopedia of the Brethren of Purity ( Rasā'il Ikhwān al-ṣafā' ), a giant compendium of 52 epistles that would greatly influence later encyclopedias. A good deal of Muslim and Western scholarship has been spent on just pinning down the identities of the Brethren and the century in which they were active. They are generally considered a secret society because of their closed and private meetings every 12 days, as mentioned in the Rasa'il . (1960), "On the Ethics of the Brethren of Purity", The Muslim World , 50: 109–121. نور, مكتبة.
Red text was written in or rewritten since the previous snapshot. Their copy is revision 1172254433.
Today
Wikipedia's first sentence called it “secret society of muslim philosophers in basra”. Today it says “secret society active during the reign of the buyid dynasty”. Read the current article and compare.
2010
2015
2020
Oct '23
2025
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What Wikipedia says this is
Every article opens by defining its subject. This one was redefined since 2010, and today's defining sentence is their current revision.
Then
secret society of muslim philosophers in basra
Now
secret society active during the reign of the buyid dynasty
Struck red text is no longer in the article; dotted amber text was rewritten. Every revision id links to Wikipedia's copy; the text shown is our own saved copy. Data: /data. Wikipedia text is CC BY-SA; quoted for the record; not affiliated with Wikipedia.