Yuval Noah Harari is an Israeli historian and a professor in the Department of History at the Hebrew University of Jerusalem. Wikipedia
Source: "A fun exploration of psychedelic drugs, especially for someone who has never tried them." - Vinod Khosla
Source: "It is the most optimistic book I’ve read in a long time." - Yuval Noah Harari
Source: This book was on Sam Altman's bookshelf.
Source: "One of those books you begin reading and instantly feel that everybody should know about it." - Arianna Huffington