Does anyone know where I can find a list of every single secret society that has ever existed?

There is no comprehensive single list of all secret societies that have ever existed in world history. Most records pertaining to secret societies are purposely kept hidden, making it difficult to create a single list. However, some websites such as Encyclopedia Britannica compile lists of notable secret societies from around the world, dating back centuries. Additionally, universities, religious institutions and fraternal organizations often maintain records of secret societies that have been a part of their history, even if they are no longer active.