Which religious group believed that god was a single divine being

Monotheism has been defined as the belief in the existence of only one god that created the world, is all-powerful and interferes in the world. Another, more broad definition of monotheism, is the belief in one god. A distinction may be made between exclusive monotheism, and both inclusive monotheism and pluriform (panentheistic) monotheism which, while recognising various distinct gods, postulate some underlying unity.

Monotheism is distinguished from henotheism, a religious system in which the believer worships one god without denying that others may worship different gods with equal validity, and monolatrism, the recognition of the existence of many gods but with the consistent worship of only one deity.

The broader definition of Monotheism characterizes the traditions of Bábism, the Bahá'í Faith, Cao Dai, Cheondoism, Christianity, Deism, Eckankar, Islam, Judaism, Mandaeism, Rastafari, Ravidassia religion, Seicho no Ie, Shaivism, Shaktism, Sikhism, Tengrism, Tenrikyo, Vaishnavism, Yazidism, and Zoroastrianism, and elements of pre-monotheistic thought are found in early religions such as Atenism, Ancient Chinese religion, and Yahwism.

There are also monotheistic parody religions, such as Pastafarianism.