Fifty years from now, millions of people will live past the age of 100 and remain healthy. This will happen because we'll be abie to study each person's genetic code and find the best way to treat and prevent illnesses in that individual.We're close to finding the mistakes in the genome that cause cancer, so in the future diseases like this may no longer be life-threatening In about fifty years time, the most important question for our society might not How long can humans live? but How long do we want to live?