
Monotheism can be defined as a belief system that believes there is only one God. Monotheists follow the Christian religion, and consider the deity to only be one. They believe God appeared to the human race as a father or Lord Jesus Christ and the Holy Spirit. Monotheists believe if one does not practice monotheism they are not entitled to the protection of God.
Religions that believe in one deity
Monotheism, which believes there is one God, is the foundation for many world religions. It differs from polytheism and atheism, which each attribute responsibility for reality to a separate god. Monotheistic religions hold the belief that God is all knowing and all-powerful. They are also non-anthropomorphic.
Dualistic religions can be described as dividing the universe into two fundamental principles: spirit or matter. This form of monotheism is also found in some gnostic traditions. These religions, which are often based on esoteric knowledge, are sometimes considered heretical and unorthodox Christians. The demiurge, or demonic being, is frequently referred to.

Many religions have sacred texts which guide their lives. The most prominent of these texts are the Christian Bible and the Hebrew Scriptures. While some religions believe these texts were created by a deity directly, others claim they came from human beings. Waaqeffanna (or "the word") is the Oromo name for the single god.
Religions that are quasi monotheistic
There are similarities between quasi-monotheist religious systems and true monotheism. However, there are also some differences. True monotheism is based on the belief that there is only one God and that all other gods can be deceived. Quasimonotheism emphasizes the role of the creator throughout all aspects of human lives.
Monotheism and its application in religion have their roots in the early modern period. The term was coined by Henry Moore in 1660 to distinguish between Christian anthropomorphic conceptions of God and Deistic concepts. Later, the term monotheism was combined with the term polytheism (a concept that first appeared in the first century CE).
The ancient Greeks and Romans had monotheistic religions, and they believed in a supreme god. Zeus' worship was a sign of the transition from polytheism into monotheism. The veneration of Zeus reduced the respect shown to lesser gods.

Monotheistic religions
Religions that are monotheistic believe in only one god, whereas religions that believe in many gods are called polytheistic. Monotheism was first formulated in the Old Testament Hebrew Bible. Other gods are called "false gods". Later, Christianity and Judaism began to emphasize the concept of a single god.
Monotheistic religions believe that there is only one God, and reject all other belief systems. As such, they have been very aggressive in the past, often justifying their actions by claiming that their religion is the only one that is true. Many times, they also used monotheism to justify the actions of others, which is not compatible with the message of their religion.
Ancient cultures often worshiped several gods, but the concept of a single god was not unusual. Some ancient civilizations even elevated one god above all the others.