The idea of Customary Law has been informing my thoughts now for several years, since first I read in Bill Bradford's (R.I.P.) "Liberty" magazine about the Somali Customary Law.
Today at Lew Rockwell's place is an article by Lila Rajiva which really bears reading as it reflects upon the very nature of law and how humans behave in social settings.
As more and more of our world is no longer made by us, we understand it less and less. We're forced to fall back on theory and speculation, on isolated reasoning.
But thinking, as Vico pointed out, is hopeless when it remains isolated reason. It has to include practical wisdom and rhetoric. The Cartesian cogito ergo sum (I think therefore I am) is just not enough.
Like a broth which has simmered long over a low fire, there is a richness to human experience with which simple reason cannot begin to compare.