Or at least a weak attempt at an explanation based on 30 minutes of vigorous internet searching after soldering a 2 dollar electronic kit bought from questionable international sources.
Electrons have the same charge, so their abundance and scarcity become the overriding factors in their tendency to move in predictable ways. In fact, electronics is the practice of controlling electron balances, to get the little rascals to reliably do tricks, while also trying to avoid getting ourselves rebalanced by careless practitioning .
