What is enlightenment?

It is unbelief.

In one phase, it rejects the myths of traditional religion but retains belief in at least one god, human immortality, and objective morality.

In its radical phase it is frankly atheist and rejects both the objectivity of morals and human existence before or after this, the only life we know.

Per se, it is not and does not entail a political, economic, or social program.

But historic periods during which unbelief has won express tolerance affording a measure of freedom of belief, of speech, and of written or other expression, usually accompanied by the suppression or end of forms of religious savagery, have been called by that name.