From living through a childhood in World War II, working as a secretary to pursue her dream of living with wild animals, trailblazing in animal behavioral research in Gombe, Tanzania, and becoming a global phenomenon, Dr Jane Goodall talks to NDTV about what makes her hopeful, and why she remains optimistic. Co-authored with Doug Abrams, her book 'The Book of Hope' is a tribute to what fuels her boundless mission to make the world a better place - her reasons for hope.