The first keeps were rectangular in shape but later ones were often circular. The Stone Keep would be surrounded by a thick stone wall containing turrets for lookouts. The Bailey was now the area outside the keep but within the outer walls and shelter for animals or craft workshops might be built against the walls.
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I believe the answer is "abnormal psychology"
The answer is: They are more likely to teach their children to rely on family and friends. Asian families are known for their close family ties and this strong bond is what the parents inculcate to their children while growing up. Parents teach their child how to maintain close family bonds consequently values and beliefs of the family members and relatives were also absorbed by the child. Due to the close familial interactions, the family values become a part of the child's development.