Long before the Robber Barons made America into an international economic power, a generation of visionary inventors gambled on innovations they hoped would bring them riches. Chief among them was Charles Goodyear, who, in the 1830s, began his obsessive quest to find the recipe for rubber, a material he believed would change the world. In chasing his dream, Goodyear entered a Dickensian underworld, miring his family in poverty, spending extended periods...