Answer: The spread of Enlightenment ideals.
Step-by-step explanation:
Napoleon's Empire got to control a large part of Europe, allowing him to introduce some of the French Enlightenment Rationalism to the rest of the continent. For example, the idea that the family of origin should not limit a man´s future allowed man from lower classes to become field marshals. Furthermore, religious toleration, the metric system, and the Civil Code were all spread under Napoleon´s Empire.