Many people have a misunderstanding of Freemasonry, aka Free and Accepted Masons. They think that Freemasonry is a secret society. It is not!! While it does have some secrets, the organization itself is not a secret.
Freemasonry is perhaps the oldest fraternal organization in the world. Check out Explanation of Freemasonry. And while you’re at it, click on the home page link there and learn a whole bunch more about Freemasonry.
From a different source, you may also read this Wikipedia article about Freemasonry.
I am proud to be a member of and a Master Mason in Freemasonry.