Ben Horowitz says this may be one of the best times in history to be 18: you're entering a world only your generation will understand. "I would be thrilled to be 18. I think it is one of the best times in history to be 18. It's unfortunate because I think the systems for getting people into work currently make people really nervous about their future." "This is like Thomas Edison's time or Henry Ford's time. You're going into a world that only you will understand. People like me will have a…