NEW DELHI: Why do people move, migrate across the globe? For centuries, they have done it for trade, stability, and better prospects. But in the 21st century, climate change, pandemics, and technology disruptions are forcing a new wave of migration across the world. In his latest book, Move, acclaimed author and global strategy adviser Parag Khanna offers a clear-eyed view of the new phenomenon. In this chat with Editor-in-Chief Nitin A. Gokhale, Khanna offers some thought-provoking theories about migration in the 21st century in our Books Corner feature.