Yuval Noah Harari has a PhD in history from Oxford University and is a professor in the Department of History at Hebrew University in Jerusalem. He specialized in World History, medieval history and military history, but his current research focuses on macro-historical questions: What is the relation between history and biology? What is the essential difference between Homo sapiens and other animals? Is there justice in history? Does history have a direction? Did people become happier as history unfolded?