古代生产力低下，人口很容易超过土地的产出。游牧民族更是屡屡遭受天灾，能够算出冬天里至少要饿死多少人，故宁愿打仗，死中求活

来源: easycity 于 2023-10-21 13:48:09 [旧帖] [给我悄悄话] 本文已被阅读：次

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