I really did try to write it so that an educated public that cares about issues like this doesn't have to be a lawyer and can read it and understand it.
The way in which mathematicians and physicists and historians talk is quite different, and what a physicist means by physical intuition and what a mathematician means by beauty or elegance are things worth thinking about.
Certain it is that their power increased always in an exact proportion to the weakness of the Caliphate, and, without doubt, in some of the most distracted periods of the Arabian rule, the Hebrew Princes rose into some degree of local and temporary importance.

