Loneliness can afflict anyone, whether young or old, rich or poor, highly-educated or illiterate, healthy or infirm. Because children are almost invariably reared in a network of intimate relationships that, if not a natural or adopted family, has some other social context (usually institutional), in the first three or four years the individual is imprinted with the norm of being accompanied. Someone - whether parents, siblings, age cohorts, friends, relatives, social workers - is in daily contact with the child. This position of security may change gradually, for instance, if childhood companions grow away from each other, or suddenly, perhaps by a change in location or situation or by a death

Social isolation is as significant to mortality rates as smoking, high blood pressure, high cholesterol, obesity and lack of physical exercise. Studies have show that people who are isolated but healthy are twice as likely to die over the period of a decade or so as others with the same health. Men are at more danger than women

People who are physically isolated, such as those who work at home or in remote areas, are hospitalized or otherwise infirm, are often subject to loneliness. Equally painful is the subjective loneliness experienced by a shy or sensitive person, or by one who is, for whatever reason, alienated from society

1. Industrial civilization, and particularly urban lifestyles, tend to force individuals into many superficial, apparently socializing, contacts, while other features of modern society tend to cause actual isolation. Such isolating features include the breakdown of the extended family, the erosion of family-centred values, and passive entertainment. Statist governments reduce individuals to anonymities, while technological progress exalts the intellect at the expense of the feelings. Smaller families, social mobility and uncontrolled urbanization decrease the opportunities for frequent, long-term and personal social interactions in a community context

2. Man is experiencing a new loneliness; it is not in the face of a hostile nature which it has taken him centuries to subdue, but in an anonymous crowd which surrounds him and in which he feels himself a stranger. (Papal Writings, 14 May 1971)