What does Y mean in UNCLASSIFIED

Yuval Noah Harari is an Israeli historian, philosopher, and author. He is best known for his books 'Sapiens: A Brief History of Humankind', 'Homo Deus: A Brief History of Tomorrow', and '21 Lessons for the 21st Century'. Harari's work explores the intersection of history, science, and philosophy, and he is considered one of the most influential thinkers of our time.

Harari holds a PhD in History from the University of Oxford, where he studied under Steven Pinker. He also holds a BA and MA in History from the Hebrew University of Jerusalem.

Harari's research focuses on the evolution of human societies, the impact of technology on humanity, and the future of our species. He is particularly interested in the ways in which our understanding of ourselves and our place in the world is shaped by our history, biology, and culture.

Harari's most famous book is 'Sapiens: A Brief History of Humankind', which was published in 2011. The book has sold over 10 million copies worldwide and has been translated into over 40 languages. 'Sapiens' explores the history of humankind from its origins in Africa to the present day, and it argues that our species has evolved through a series of cognitive revolutions that have allowed us to dominate the planet.

Harari is a futurist who believes that we are on the cusp of a new era in human history. He argues that the development of artificial intelligence (AI) and other new technologies will have a profound impact on our species, and that we need to be prepared for the challenges and opportunities that lie ahead.