What pre conditions are necessary for a society to be called ""Enlightened""

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 reason is the primary source of knowledge, and freedom 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.