The ageing of the world's population - in developing and developed countries - is an indicator of improving global health. The world's population of people 60 years of age and older has doubled since 1980 and is forecast to reach 2 billion by 2050. This is a cause for celebration. Older people make important contributions to society as family members, volunteers and as active participants in the workforce. The wisdom they have gained through life experience makes them a vital social resource.