in industrialized countries today,many elderly people suffer form depression.the main cause of this is loneliness.In the past,older people usually lived with other members of the family.they usually had some responsibilities around the home.For example,older woman could help take care of the children or prapare meals.Older men could help their sons at work or around the house.these dats,married children often prefer to live on ther own,sometimes far away from their parents.thus,older people may be cut off from family ties.they may feel cut off from the world around them.Life has changed so much so quickly that older people sometimes feel that they do not belong any more.