This landmark six part series examines some of the most influential ideas the world has ever seen, and how they shaped history.
The ideas behind Communism, Christianity, democracy, feminism, capitalism, environmentalism are explored by high profile interviewees – President Mikhail Gorbachev, Archbishop Desmond Tutu, former MP Tony Benn, Germaine Greer, Joseph Stiglitz and Bjorn Lomberg.
Executive Producer: Malcolm Clark