Over the past 50 years, people have become used to the idea that they will probably live longer than their grandparents did. However, a longer life is only desirable if you can look after yourself and be independent, otherwise there can be disadvantages for everyone. If you walk into a hospital in my country, you are likely to see a lot more elderly people than you did in the past. In fact, this is causing significant problems as there is a shortage of beds. Medical treatment is keeping the elderly alive, but at what cost to others? On top of this, one of the biggest medical problems these days is dementia. Even if old community are still fit, they may not be able to look after themselves. They may have to live with their children or be cared for in a home, which can be expensive. Elderly population do not like to be a burden, but their children can feel obliged to care for them. Obviously, not all old society become ill. Those who remain healthy can enjoy a happy old age as...