"I left the fairy tales lying on the floor of the nursery, and I have not found any books so sensible since." 

-G.K. Chesteron

Freedom is not a complex idea. But we do live in a complex world, and only complex government forms have proven able to keep those with power from exerting too much of it. The American founders mixed the simple and the complex. They simply pitted power against power, institution against institution, authority against authority. And they simply put the people in charge of it all.