What were the 3 major major ideas of the enlightenment?

Reason and natural law were two of the central ideas of the Enlightenment. Using human thought and the scientific method, the operation of the world and society could be understood and perfected. This period also emphasized deism, which was based of reason and natural law, and religious tolerance. In the area of government, the Enlightenment believed in a separation of powers and the doctrine of laissez-faire. Using these theories, the government would best be organized to ensure a maximum amount of freedom and security.