Whether we’re swamped by it or starved of it, the value of information depends on its quality, and its usefulness depends on our ability to communicate it successfully. As activists, we can't sit and wait for people to wade through sixty-page reports. To influence people we must make strong arguments and communicate them using strong evidence. Well timed, rigorous and well presented information is the greatest asset activists possess. In this book we explore how to influence issues using the right combination of information, design, technologies and networks. Through over 60 examples of visual information campaigns from around the world we show how they capture attention, present stories and take us on journeys through data.