There are basically four worldviews – ideas of how everything came about and function.
These worldviews are pre-religion, pre-science. In fact, religion and science build of off these worldviews.
Theism is the idea that a Creator created everything. The Creator is not Itself part of creation, but is actively involved in it. Some theistic religions include Judaism, Christianity and Islam.
Deism is very much like Theism, but unlike Theism the Creator is not actively involved in creation. Usually the Creator is also not actively “conscious”. Some of the indigenous African religions are Deistic.
Pantheism is the idea that God is in everything and everything is God. The Creator is the creation – creation is the Creator. Pantheistic examples are Hinduism and the New Age movement.
Atheism is the idea that there is no God. Everything that came about (creation) came about spontaneously. Modern science is often atheistic. (Thus, atheism and modern science is build on the assumption that "things" can spontaneously just exist. Atheism and modern science is therefore also a belief-system, since it, like all other religions, are build on an initial assumption.)
For all practical reasons it is impossible for us to know which of the four is true. However, the moment we start any discussion on reality, religion, science, morality, justice, etc. we are assuming one of these four views. We assume one of them as
a priori.