Elon Musk (@elonmusk) “A low birth rate due to extended periods of prosperity and low perceived externa” — TopicDigg
Elon Musk
@elonmusk
加入 June 2009
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A low birth rate due to extended periods of prosperity and low perceived external danger is the primary reason that Rome and most other powerful civilizations collapsed.
Rome had a very high birth rate when under extreme pressure from Carthage and a low birth rate a few generations after Carthage, their last serious threat, was finally destroyed.
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