Freemasonry has always been a highly controversial movement. Yet in spite of the vast literature that has been produced on the subject, its origins have remained obscure. David Stevenson demonstrates that the real origins of the essentials of modern freemasonry lie in Scotland around 1600, when the system of lodges was created by Stonemasons. With rituals and secrets blending medieval mythology with a number of late Renaissance intellectual influences, a movement was created that was to spread through England, across Europe, and then around the world.