> Was really so (specifically “lethal”? Do you have sources? Pretty famous example: https://en.wikipedia.org/wiki/Venetian_glass#Island_of_Murano https://en.wi

> Was really so (specifically “lethal”? Do you have sources? Pretty famous example: https://en.wikipedia.org/wiki/Venetian_glass#Island_of_Murano https://en.wikipedia.org/wiki/Venetian_glass#Island_of_Muran... > Glassmakers were not allowed to leave the island without permission from the government. Leaving without permission, or revealing trade secrets, was punishable by death Though importantly this was enforced by state.