Religion is just one amongst many other kinds of beliefs which are held to be unquestionable truths. Political ideologies are another kind.
These beliefs are what drive history. They are what lead people unto a certain path. They inspire them to speak out, to act.
Individuals are never trully free, for they can never grant themselves their own freedom. They must always rely on laws and rights given unto them by other people. Not even within their own minds are they free, for even within them, their minds still echo the ideas which had been revealed unto them by others.
No gods, no ideologies, no human creations. This is what true freedom is.