
Monotheism refers to a belief system that only one God exists. Monotheists believe in one God and are Christians. They believe God visited the human race in three different forms, including as a father and Lord Jesus Christ as well as as the Holy Spirit. Monotheists believe if one does not practice monotheism they are not entitled to the protection of God.
Religions that believe one deity
Monotheism, which believes there is one God, is the foundation for many world religions. This is different from atheism and polytheism which each assign responsibility for reality to separate gods. Monotheistic religions are those that believe God is all-knowing. They are usually non-anthropomorphic.
Dualistic religions can be described as dividing the universe into two fundamental principles: spirit or matter. This is a variation on monotheism found in some of the gnostic systems. These religions are based in esoteric knowledge. Orthodox Christians may consider them heretical. The demiurge may be called a demonic being.

Many of these religions have sacred texts that guide their lives. The Christian Bible, Hebrew Scriptures and the Islamic Qu'ran are some of the most well-known. Some religions believe the texts were directly written by a god, while others believe they were written from humans. In Oromo, for example, the single god is called Waaqeffanna, or "the word."
Religions that are quasi monotheistic
Religions that are quasi-monotheists have some similarities to true monotheism, but there are differences. True monotheism holds that there is one god and all other gods are illusionary. Quasimonotheism emphasizes the role of the creator throughout all aspects of human lives.
The early modern period is where the concept of monotheism was first developed. Henry Moore invented the term "monotheism" in 1660 to differentiate between Christian anthropomorphic notions of God and Deistic ideas. Later, the term "monotheism," was used in conjunction with "polytheism", another concept that was created in the first century CE.
The ancient Greeks and Romans had monotheistic religions, and they believed in a supreme god. Zeus was the symbol of the transition from polytheism and monotheism. Zeus worship also reduced respect for lesser gods.

Religions that are monotheistic
Monotheistic religions believe only in one god. Religions that believe multiple gods are called polytheistic. Monotheism is rooted in the Old Testament Hebrew Bible. Other gods can be called "false Gods". Later Christianity and Judaism stressed the concept of one god.
Monotheistic religions assert only one God and reject all other beliefs as false. They are known for being aggressive, and have used monotheism to justify their past actions, often claiming that their religion is only true. They have used monotheism in many cases to justify their actions, which is contrary to the religion's message.
Many gods were worshiped in ancient cultures, but one god was not unusual. Some ancient civilizations elevated one god above all others.