Universality indeed ... :)

In a wire, electrons rebound off each other in such a complicated fashion that there’s no way to follow exactly what’s happening.

Nature is economical. Recursion, feedback loops and endless variations on a digital construct like DNA rule, based, in part, on the three laws of thermodynamics.

1. Energy can neither be created or destroyed, only transformed.
2. The entropy of any isolated system always increases.
3. The entropy of a system approaches a constant value as the temperature approaches absolute zero.

Life temporarily violates the 2nd law as it extracts and transforms energy from the environment to reduce entropy inside its given form factor in the process of staying alive in a reality one will never fully understand in any way, shape or fashion. With this in mind, the notion of universality in all ways linked to conductivity becomes yet another way of why  nature is an economic mistress to the max.

But over the last 50 years, mathematicians and physicists have begun to grasp that this blizzard of movement settles into elegant statistical patterns. Electron movement takes one statistical shape in a conductor and a different statistical shape in an insulator.

That, at least, has been the hunch. Over the last half-century mathematicians have been searching for mathematical models that bear it out. They’ve been trying to prove that this beautiful statistical picture really does hold absolutely.

Universality describes many different kinds of things: the frequency and size of avalanches, the timing of buses in decentralized transit systems, and even the spacing of cells in the retina of a chicken. It pertains, in general, to complex, correlated systems.

Universality indeed ... :)