Ed Conway is an economics journalist and author of the book “Material World: The Six Raw Materials that Shape Modern Civilization.”
On today’s show, Ed reveals how three of those often-overlooked materials—iron, copper, and sand—shaped human advancement from the Renaissance to the Industrial Revolution to the digital age. And he talks about what they mean for our future.

From Kill Switch: The Glassholes Are Back
39:39

Building a Self-Driving Tractor to Change the Future of Food
43:21

We’re Going to Need a Better Boat
35:53