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governance × 41government × 12
society × 10
economy × 6
politics × 5
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science-fiction × 4
law × 4
empire-building × 3
humans × 2
culture × 2
space-colonization × 2
civilization × 2
military-defense × 2
space-warfare × 2
modern × 2
finances × 2
kingdom × 2
taxes × 2
science-based × 1
biology × 1
magic × 1
technology × 1
planets × 1
warfare × 1