World Change and Idealism

Just when you think I've been too much of an Apple fanboy for one day...

Think Different - Wikipedia, the free encyclopedia

Because the people who are crazy enough to think that they can change the world, are the ones who do.

So, the idea here: idealists may in fact be involved in this type of social change Attali and others have been talking about.
Is this what the world really needs? Are the dreamers' dreams worthier than those of the majority?