The level of civilization can be described by the prevalent material: Stone Age, Bronze Age, Iron Age. What comes next?
The Type Metal Age starting with Gutenberg's printing press, because of course that changed the world. Not too many people recognize that the most important part of Gutenberg's contribution was hugely metallurgical.
The Aluminum Age starting with the Hall process. Before then, aluminum was a precious metal.
Currently Aluminum Age, or perhaps Silicon Age.
What does the future hold? The Room Temperature Superconductor Age?
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