Abstract
In modern societies, the number of people who are socially isolated and experience constant feeling of loneliness is increasing. Main causes of this social isolation are associated with both inherent features of an individual and features of structures such as family and local community. An isolated person is a person who has limited number of significant others. Nevertheless, loneliness may also occur when a person is a part of a lot of social relations. The feeling of loneliness is therefore an individually experienced discomfort resulting from a subjective evaluation of the desired and the existing network of social relations. Both phenomena are threats to the welfare of individuals and at the same time are a challenge for organizations which are dealing with social policy. An analytical category which provides the diagnosis of loneliness and isolation is the social bond. The assessment of deficits associated with social bonds and can be performed measuring following criteria: quantity, quality and potency of the social bond.