Homo Sapiens first belief
Sociology tells us that the first human being was hunter-gatherer. He was very primitive and knew nothing. He took some of his surrounding forces as gods (i.e., Animism and Shamanism). Later he slowly learned how to domesticate animals and plant seed. That let to settlements and villages. Division of labor started to create specializations and classes within society. As society became more sophisticated, mans association with religion developed further.
Emile Durkheim and Max Weber thought that as modernity unfolds, human kind would move gradually away from religion and sacred and cling more to material values.
Our contemporary world insists to prefer the materialism of the student Aristotle over the teacher Plato. As if the two World Wars were not enough to prove the ugly face of the “enlightened” Europe.
As days pass, the world observes how wrong those sociologist were. Human kinds first belief was a monotheistic religion of Islam. Islam did not came with Prophet Muhammad. It was the first and default condition of Adam, Noah, Abraham and all other prophets. At times when mankind strayed from the teachings of these prophets they descended to polytheism, animism, shamanism and all other isms.