Identityism is  the school of Sufi metaphysics of unity of being traditionally known as Wahdat al-Wujud or Wahdat ul-Wujood (Arabic: Literally, unity of existence) formulated by Ibn Arabi.
The school of thought known as "Unity of Being" or "Wahdat al-Wujud" (Arabic: literally, unity of existence), formulated by Ibn Arabi, is the core concept of Identityism.