A Systemic Model -- Life-Span Development of the Deaf Ecosystem -- Life-Span Development of the Hard-of-Hearing Ecosystem -- Treating the Hard-of-Hearing Individual in Context -- Treating the Deafened Individual in Context -- On Joining the Deaf Client -- The Communication Logistics -- The Use of an Interpreter for the Deaf in Family Therapy -- Hearing Children of Deaf Parents -- Involving the Vocational Rehabilitation Systems -- Coping With Ordinary Evil