Men have lived in groups and societies (1)……..…. all times and in all places, as (2)……....... as we know. They do not seem (3)……..…….. to survive as human beings (4)………... they live in (5)…….…… cooperation with one (6)…………….. . The most basic of (7)……………. human groups in the family in (8)……………….... various forms. The most important reason for this is the simple (9)…….....….. that human beings take many years to (10)…....…….. .
In (11)……….........….. they are the most helpless of all earthly creatures. For several years after (12)……......….. , a child has to be (13)…....……….., clothed and protected day and night. In all societies such duties normally fall (14)…………..… a family group of some (15)…………….. .
Men (16)…….…. groups for countless (17)……... reasons. For instance, it is (18)…………….. by cooperating that they are able to (19)……...… their environment and defend (20)……….… .
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