> Magically plop me in a stone-age agrarian society, and we'd be back to at least an 18th-century level of technology in a couple decades. Execution is key! Th

> Magically plop me in a stone-age agrarian society, and we'd be back to at least an 18th-century level of technology in a couple decades. Execution is key! That you know how it works does not mean you can successfuly build it!