What would the world be like if the Roman Empire never fell?

Let's assume that the Roman Empire never fell and survived to this day. What would the world be like now?<br><br>Would America even exist? Or would we be a province of Rome? What would the Middle East look like? Would there even be an Israel? How would the crusades have affected the world?<br><br>Please tell me your take, and remember, this is just for fun.