In the last few years the world has changed in unexpected ways. The influence of radical groups and ideas is growing. What was once considered extreme is now the mainstream. But what is the real power of radicals ? Jamie Bartlett, one of the world's leading thinkers on radical politics and technology, takes us inside the strange and exciting worlds of the innovators, disruptors, idealists and extremists who think society is broken and believe they know how to fix it. By giving us a fascinating glimpse at the people and ideas driving these groups - from dawn raids into open mines to the darkest recesses of the internet - Radicals introduces us to some of the most secretive and influential movements today.