Graham Greene at 82 years old was still writing, and I don't think anyone can deny the force, the expertise, and the unique quality of his writing, if you take his complete oeuvre.
William GoldingBiography always has fulfiled this role. Robinson Crusoe is a biography, as is Tom Jones. You can go through the whole range of the novel, and you will find it is biography. The only difference between one example and the other is that sometimes it's a partial biography and sometimes it's a total biography. Clarissa, for example, is a partial biography of Clarissa and a partial biography of Lovelace. In other words, it doesn't follow Lovelace from when he is in the cradle, though it takes him to the grave.
William GoldingConsider a man riding a bicycle. Whoever he is, we can say three things about him. We know he got on the bicycle and started to move. We know that at some point he will stop and get off. Most important of all, we know that if at any point between the beginning and the end of his journey he stops moving and does not get off the bicycle he will fall off it. That is a metaphor for the journey through life of any living thing, and I think of any society of living things.
William Golding