From the fight against polio to fixing education, what’s missing is often good measurement and a commitment to follow the data. We can do better. We have the tools at hand.
By: Bill Gates
We can learn a lot about improving the 21st-century world from an icon of the industrial era: the steam engine.
Harnessing steam power required many innovations, as William Rosen chronicles in the book “The Most Powerful Idea in the World.” Among the most important were a new way to measure the energy output of engines and a micrometer dubbed the “Lord Chancellor” that could gauge tiny distances.