Mukesh Ambani is now India and Asia's richest man.

What can we read of India's growth story from the rise of its billionaires? Michelle Martin speaks with James Crabtree, Associate Professor of Practice, Lee Kuan Yew School of Public Policy and author of The Billionaire Raj: A journey through India’s new Gilded Age to tell us more about India’s growth story, its tech giants and the transformative digital age for India.