求翻译：1929～1941年这段时期是从国内的一次崩溃开始的，这场崩溃源于多种原因，但最根本的原因多半是对群体福祉和个人满足之间的关联自私自利地视而不见。灾难帮助美国人记起了他们是一个民族，只有通过合作，才能把大车从泥潭中拉出来。这一时期结束于美国卷入一场全球大战的前夕，导致这场战争的主要原因，是很多国家都同样顽固地拒绝承认它们的安全与所有国家的良好状况之间有着密切的联系——即“一个世界”的观念。关于人的共性和国家的福祉，反复引发大的争论，是这十多年里最有意义的活动。即便是在日常生活中，普通美国人也不能不受到其结果的深远影响。是什么意思？

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The period 1929 to 1941 is from the domestic of a collapse, the collapse of Starting from a number of factors, but most of the most fundamental reason for well-being and personal groups meet selfishness with the link between turn a blind eye to it. Disaster help Americans remember Their is a nation,

This period is 1929-1941 years starts from a collapse in domestic, the crash comes from a variety of reasons, but most of the most fundamental reason is the well-being of the Group and individuals meet the associations between selfishness and turn a blind eye. Disaster