**** Demographic factors--event two, slow onset
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The rate of change between "event one" and "event two" (this mismatch of terms recognizes the dynamic, rather than event-like nature, of the actual demographic situation) also helped shape linguistic development. This was the period of pidginization and creolization at its most unstable. Long-term importation of non-native labor and a lack of natural increase (a common situation in plantations operating at the peak of their most exploitative capacity) provided continual disruption of the linguistic community. The longer such a situation prevailed, the more substrate social strategies could be conventialized as the result of habit and experience.
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Philip Baker and Chris Corne (1986), "Universals, Substrata and the Indian Ocean Creoles," in Muysken and Smith, _Substrata vs Universals_; 165-167.