Answer:
Being enlightened means being open-minded, having a clear view of the world, without ties to preconceebed ideas.
In an enlightened society the priority is the good of the people as a whole, where <em>reason</em> is the primary source of knowledge, and <em>freedom</em> is the main condition to achieve enlightment, and especially freedom to make public use of reason; so people must be free to think thus grow.
History is really important because it helps us understand why we live the way we are living and why we are where we are as a species and country.