It was not a success and, on his return to Syria in November 1940 after a brief stay in Baghdad, al-Arsuzi established a new party, the Arab Ba'ath; by 1944, however, most of its members had left and joined Michel Aflaq's and Salah al-Din al-Bitar's Arab Ba'ath Movement, which subscribed to a nearly identical doctrine.
Partai tersebut gagal dan, saat ia kembali ke Suriah pada November 1940 setelah singgah lama di Baghdad, al-Arsuzi mendirikan sebuah partai baru, Partai Ba'ath Arab; namun, pada 1944, kebanyakan anggotanya hengkang dan bergabung dengan Gerakan Ba'ath Arab pimpinan Michel Aflaq dan Salah al-Din al-Bitar, yang memiliki doktrin yang nyaris identik.