In the original version:
automation made manufacturing cheap;
proton converters made energy very cheap;
both gravity control and the hyperdrive made interstellar travel possible.
(This recalls James Blish explaining that antigravity, anti-agathics and the Germanium monetary standard made interstellar trade by flying cities possible.)
In the revised version:
automation and Solar System mineral wealth made most manufacturing cheap;
small, clean, simple fusion units made energy very cheap;
gravitics led to the hyperdrive;
the hyperdrive made interstellar travel possible.
Can this energy be stored? In any case, it is easily produced and very cheap.
1 comment:
Sure, you just need a set of Douglas-Martin sunpower screens.
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