Wisdom or passion?

Is the story of human kind a story about 20 year olds? Even when rulers (for example) get to an older age, the vision of the world seems to have fossilized somewhere in their early 20s. Their ideas, ambitions, jealousies etc. are all from their youth. They almost never change. Most artists do their best work in their 20s or their later work is the fruit of their youthful experiences. And now people are living longer. Life experiences are being delayed. At least in the west. (It would seem that in other parts of the world, their times are still being dominated by  young people.) Will this aging population change the perceptions of the world, of life itself? Will wisdom rule over passion?