Maxwell's Equations: Simplicity that changed the world
In 1861-1862, Maxwell created 4 elegant equations which unified electromagnetism. Academics could now do in hours what used to take weeks. Breakthroughs were happening left right and center for the next 50 years. Without these equations we wouldn't have; Smartphones, TV, Microwaves, GPS, Internet, or General Relativity. The fact is, a simple elegant mathematical model can be world changing.