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题目材料：
While the shift from single family to multifamily winter dwellings and the corresponding organizational changes in domestic groups were among the more conspicuous features of Labrador Inuit society in the seventeenth and eighteenth centuries, scholars disagree about what caused this shift. One proposed explanation looks at the shift as an adjustment to the negative effects of long-term environmental cooling on migratory whale and seal species, suggesting that communal housing allowed families to manage these scarce subsistence resources more efficiently. Here, the Labrador case is seen as consistent with traditional adaptive strategies used during periods of productive uncertainty, strategies that typically depend on intensification of communalism in some form.
Critics dismiss this explanation, citing insufficient evidence of resource scarcity and noting that Labrador's southerly location (relative to other Inuit locales) would have mitigated the effects of environmental cooling on sea mammal distributions. In fact, whales and seals retreating from former feeding ranges in Arctic waters were likely to have found haven off Labrador at this time. Still, geographically variable distributions probably occurred owing to short-term climatic perturbations such as heavier-than-usual ice formations. However, it remains unclear whether such episodes were significant enough to contribute to a shift in living arrangements.
Critics dismiss this explanation, citing insufficient evidence of resource scarcity and noting that Labrador's southerly location (relative to other Inuit locales) would have mitigated the effects of environmental cooling on sea mammal distributions. In fact, whales and seals retreating from former feeding ranges in Arctic waters were likely to have found haven off Labrador at this time. Still, geographically variable distributions probably occurred owing to short-term climatic perturbations such as heavier-than-usual ice formations. However, it remains unclear whether such episodes were significant enough to contribute to a shift in living arrangements.
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