There is only one will of God, the Trinity our Creator, who does good, yet His creations err to produce divisions. This is a pertinent section from the Catechism of the Catholic Church:
285 Since the beginning the Christian faith has been challenged by responses to the question of origins that differ from its own. Ancient religions and cultures produced many myths concerning origins. Some philosophers have said that everything is God, that the world is God, or that the development of the world is the development of God (Pantheism). Others have said that the world is a necessary emanation arising from God and returning to him. Still others have affirmed the existence of two eternal principles, Good and Evil, Light and Darkness, locked, in permanent conflict (Dualism, Manichaeism). According to some of these conceptions, the world (at least the physical world) is evil, the product of a fall, and is thus to be rejected or left behind (Gnosticism). Some admit that the world was made by God, but as by a watch-maker who, once he has made a watch, abandons it to itself (Deism). Finally, others reject any transcendent origin for the world, but see it as merely the interplay of matter that has always existed (Materialism). All these attempts bear witness to the permanence and universality of the question of origins. This inquiry is distinctively human.
286 Human intelligence is surely already capable of finding a response to the question of origins. The existence of God the Creator can be known with certainty through his works, by the light of human reason,122 even if this knowledge is often obscured and disfigured by error. This is why faith comes to confirm and enlighten reason in the correct understanding of this truth:
"By faith we understand that the world was created by the word of God, so that what is seen was made out of things which do not appear."123
122 Cf. Vatican Council I, can. 2 § I: DS 3026.
123 Heb 11:3.
292 The Old Testament suggests and the New Covenant reveals the creative action of the Son and the Spirit,132 inseparably one with that of the Father. This creative co-operation is clearly affirmed in the Church’s rule of faith: “There exists but one God. . . he is the Father, God, the Creator, the author, the giver of order. He made all things by himself, that is, by his Word and by his Wisdom”, “by the Son and the Spirit” who, so to speak, are “his hands”.133 Creation is the common work of the Holy Trinity.
132 Cf. Ps 33:6; 104:30; Gen 1:2-3.
133 St. Irenaeus, Adv. haeres. 2,30,9; 4,20,I: PG 7/1,822,1032.