I think it depends. If the world is changing fast enough, the experience may lead to wrong conclusions. A larger snowball may be difficult to change its course.

I think it depends. If the world is changing fast enough, the experience may lead to wrong conclusions. A larger snowball may be difficult to change its course. It is all relative. Actually in a modern society, the head of government shouldn't matter at all. He/she would be a accommodator not a decision maker.