Ethical monotheism originated within Judaism. It is evident in many different religions, such as Zoroastrianism, the Bahá'í Faith, Christianity, Sikhism, Islam, and many more. All of these religions include the belief in one sole higher power, who controls everything that occurs in the world. In Christianity, God is worshiped as the Trinity or according to Non-trinitarian conceptions of God.
Post-Enlightenment Jewish thinkers presented modified conceptions of God that attempted to reconcile modern philosophical trends with Jewish tradition. These figures tended to stress human liberty and the ethical aspects of God. Solomon Formstecher (1808-1889) conceived of God as the spirit of the world, a concept derived from Hegel. God is completely free, and as freedom is a precondition for moral activity, God is the perfect ethical being. Leo Baeck (1873-1956) presented Judaism as, essentially, ethical monotheism, suggesting that the belief in one God-Judaism's fundamental innovation-is equivalent to the belief in a single source of moral law.
Hermann Cohen (1842-1918) was also, originally, concerned with the ethical implications of God. In his early rationalistic thought, he presented God as the "idea" that guarantees morality. Cohen's later work, however, was more traditional from a Jewish point of view, and he became more concerned with the reality of God and less concerned with the "idea" of God. Cohen's students, Franz Rosenzweig (1886-1919) and Martin Buber (1878-1965), eschewed Cohen's reliance on reason and rooted their philosophies in the experiential.