The assassination of the American activist Charlie Kirk has opened a particularly dark episode in the politics of that nation. Mr Kirk’s code was one of open debate and reason; his belief was that by going out to meet those with different views and opinions, and by engaging with them in good faith, it was possible to win them over to his cause.

This is how democracy is supposed to function, with word against word and idea against idea. It is an unspeakable tragedy that he should have been murdered in front of his wife and young children while putting his beliefs into action. 

And it is a tragedy which many in politics should feel visceral responsibility for. The rhetoric on the Left has noticeably escalated in recent years, with many politicians toying with language that implies outright violence on the part of those who oppose their ideology. 

This has been noted among their supporters, with many on social media appearing to react not with horror or dismay at the killing of a young father, but instead with glee, taking time out from their days to mock the dead man or celebrate his death. Some chose to make snide remarks about his support for the second amendment; others to imply that he had effectively brought this upon himself.

This was not the first incident of political violence in America, and it will not be the last. But there is a step-change inherent in the target of such violence switching from politicians who draw ire with their decisions, to writers and broadcasters who do so simply by expressing ideas. Without the free exchange of views Charlie Kirk championed, democracy cannot survive. His killing is a grievous blow to America’s body politic.