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Language
5 inventions to master first, in an order where each one only needs those before it.
Light, heat and cooked food
Twisted fibres that hold the world
Clay turned to stone by fire
needs 1
Threads crossed into cloth
needs 2
A cheap surface for memory
needs 3
Rising on warm air
Goal · needs 1, 4, 5
Type a name, a date, a material, a domain…