Lack of relationships

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Note added at 6 mins (2004-11-16 22:46:26 GMT)
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lack of connection/connectedness

As an alternative to the suggestions provided by Allesklar

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Note added at 13 mins (2004-11-16 22:53:38 GMT)
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Another idea: **social isolation**

Unconnectedness as a characteristic of our sick society

Aber wer einmal mit offenen Augen eine Hip Hop Veranstaltung besucht hat, wird schnell erkannt haben, wie falsch das Gerede um "community", um Gemeinschaft ist: was mensch dort sieht ist die "lonely crowd", eine Ansammlung vereinzelter Menschen, die nichts verbindet ausser ihrer Beziehungslosigkeit.

http://www.free.de/schwarze-katze/texte/musik01.html

Riesman taught at the universities of Buffalo and Chicago before returning to Harvard, his alma mater, to teach (1958–80). He studied primarily the social character of the urban middle class and is noted for The Lonely Crowd (1950), the title of which became a catchphrase for the alienation of the individual in modern urban society.
http://concise.britannica.com/ebc/article?tocId=9376920

Alienation: Emotional isolation or dissociation

This might fit. Let your context be your guide.