The correct answer is by taking a secular view.
Secular is a term that refers to this idea of not having religion or religious belief involved in a topic. In this case, Enlightenment thinkers ignored religion as a factor and developed theory about government structure based on their experiences and studies.
During this era, the idea of separating religion and politics became popular thanks to individuals like John Locke who believed that there should be a "separation of church and state."