The best books I read in 2019 1. The Social Leap by @BillvonHippel https://t.co/Jfx9euHpVp "At least since the steamship, people have travel

The best books I read in 2019 1. The Social Leap by @BillvonHippel https://t.co/Jfx9euHpVp "At least since the steamship, people have travel