Final answer:
According to Auguste Comte, Supernatural Forces were the dominant belief system in the theological state, the first stage of societal development.
Step-by-step explanation:
The prevailing belief system during the theological state, according to Auguste Comte, was that of Supernatural Forces. Comte's law of three stages denotes the progression societies make through specific ways of thinking. The theological state, which is the first stage, is characterized by an explanation of life events through supernatural forces. This was followed by the metaphysical stage and finally the positive state, also known as positivism, where scientific and empirical approaches to understanding the world prevail over religious or supernatural explanations.