History?
In response to all the debate over Wicca's origins, I have only one thing to say: Does it really matter? Are you going to be asked to recite the history of your religion to the one you love before you can be together forever? Are you going to have to tell exactly where and when it began to take your next breath? Somehow, I doubt it. I have a simple answer to the debate.

Start with you. Forget Gerald Gardner and Margaret Murray. Start the history of Wicca with the day you discovered it. For me, Wicca began on a warm summer day in the library, when I began looking for a potion recipe that I never did find. All my life I had heard about witches, potions, spells and magic. I knew there was no way all these stories could exist without at least a grain of truth, so I began looking for something I never did find, and found something I was never quite aware of searching for.

When someone asks me when Wicca started, I tell them something like "Well, there are almost as many theories on that as there are witches and Wiccans, but it started for me...(however long it'd been)." And then I usually refer them to the library or Witchvox or religioustolerance.org. Or I just point in the general direction of the building and say "Check the library" right off the bat.

But hey, if you want to go with one of the other more common theories, go right ahead. It's your brain, not mine; I have no control over what you decide to keep in it.
Follow the Butterfly!
To the Map!