Another chance to hear three of the best recent episodes of Four Thought, each addressing hinge moments in the history of war and terror, and re-assessing the response of the West.

Hashi Mohamed re-interprets a recent British response to an act of terror on our own streets, arguing that the episode tells us a great deal about our nation that we take for granted.

Benedict Wilkinson challenges how we think about terrorism more generally, asking us to seriously reconsider how we confront terrorists on a global scale.

And drawing on his personal experience of advising Poland and Russia at the end of the Cold War, world-renowned economist Jeffrey Sachs urges us to remember lessons of the past when taking action in the present.

Producer: Katie Langton.