Who created Arianism?

Arianism was created by Arius, a Christian priest from Alexandria, Egypt, in the early 4th century. He taught that Jesus Christ, the Son of God, was created by God the Father and therefore distinct and subordinate to Him, which contradicted the orthodox Christian belief in the co-eternity of the Son with the Father. Arius's views led to significant theological disputes and were ultimately condemned at the First Council of Nicaea in 325 AD.