"A Brief History of Humanity". According to QQ Music query, in the perfect MV song of the singer Era Youth Group, Liu Yaowen is holding a book called "A Brief History of Humanity". This book is a best-selling book that explores human history from a scientific perspective. Written by Israeli historian Yuval Harari. "A Brief History of Humankind" reveals the development trajectory and possible future direction of human society through the analysis of important events such as human evolution, the agricultural revolution, the rise of empires, and the technological revolution.