How come Latin Europe is much less crowded than Rhenish Europe?

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How come Latin Europe is much less crowded than Rhenish Europe?
How come Latin Europe is much less crowded than Rhenish Europe?
Latin meaning France, Spain, Portugal. Rhenish meaning Rhine River which includes the Netherlands, Flanders, and west Germany.
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9 d
I think because Germanic people are more industrious than Latin people so attracted more immigrants with the impression of better quality countries. Maybe.
How come Latin Europe is much less crowded than Rhenish Europe?
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