Ibn Arabi[a] (July 1165–November 1240) was an Andalusian Sunni scholar, Sufi mystic, poet, and philosopher who was extremely influential within Islamic thought. Out of the 850 works attributed to him, some 700 are authentic, while over 400 are still extant. His cosmological teachings became the dominant worldview in many parts of the Muslim world.[1]

His traditional title was Muḥyiddīn (Arabic: محيي الدين; The Reviver of Religion).[2][3] After his death, practitioners of Sufism began referring to him by the honorific title Shaykh al-Akbar, (Arabic: الشيخ الأكبر)[4] from which the name Akbarism is derived. Ibn ʿArabī is considered a saint by some scholars and Muslim communities.[5][6][7]

Ibn 'Arabi is known for being the first person to explicitly delineate the concept of "wahdat al-wujud" ("Unity of Being"), a monist doctrine which claimed that all things in the universe are manifestations of a singular "reality". Ibn 'Arabi equated this "reality" with the entity he described as "the Absolute Being" ("al-wujud al-mutlaq").

Source: https://en.wikipedia.org/wiki/Ibn_Arabi