# Ryan North: How to Invent Everything

An episode of [Long Now](https://invisiblenetwork.ai/podcast/186908455), 28 Feb 2023.

Audio: https://podcast.longnow.org/salt/redirect/salt-020230131-north-podcast.mp3

How would someone fare if they were dropped into a randomly chosen period in history? Would they have any relevant knowledge to share, or ability to invent crucial technologies given the period's constraints? Ryan North uses these hypothetical questions to explore the technological and implicit knowledge underpinning modern civilization, offering a practical guide of how one could rebuild civilization from the ground up.

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