“From a long view of the history of mankind—seen from, say, ten thousand years from now—there can be little doubt that the most significant event of the 19th century will be judged as
Maxwell’s discovery of the laws of electrodynamics.” --Richard Feynman

What was James Clerk Maxwell's stroke of genius? The one that enabled global communications and the information age?

Plus: Flex your calculus muscles to find the differential form of Maxwell's equations.