Filled with his signature warmth and wit, our late friend Hans Rosling's memoir is an inspirational read about a life that touched so many. Hans' work focused on data and research, but as this book makes clear, people were at the heart of his story. More than ever, our world needs the lessons Hans shares in these pages: to be guided by evidence and to live with optimism that we can make progress. This book provides a dose of hope in difficult times. Bill and Melinda Gates