Hello and welcome to the intelligence from The Economist. I'm your host, Jason Palmer.

Every weekday we provide a fresh perspective on the events shaping your world.

Tuberculosis remains a global killer, in part because it's fast evolving its way around existing drugs.

Tracking those variants and the infections they cause just got easier, thanks to a mix of methods old and new, and the help of thousands of volunteers.

And one of the sharpest markers of revolutionary era Iran was the quashing of culture.

The hardliners wanted no non-Islamic influence creeping in.

So why, under a new hardline president, is Iran celebrating Western pop artists like Andy Warhol?

First up, though, In Parliament yesterday, Britain's Prime Minister Boris Johnson led tributes to Sir David Amos.

A man who used his decades of experience to offer friendship and support to new members of all parties,

whose views often confounded expectation and defied easy stereotype,

and who believed not just in pointing out what was wrong with society,

but in getting on and doing something about it.

On Friday, the member of Parliament was stabbed to death in a church in the small town of Lee-on-Sea

in South East England, as on every Friday, the Conservative Party MP was there to meet local

people and hear their concerns.

A 25-year-old man has been arrested and the attack has been declared a terrorist incident.

Many MPs are now calling for greater protections.

In the wake of Sir David's death, Chris Bryant, an MP with the Labour Party, called for people to be kinder. He then received a death threat from a man who was later arrested.

It's not just name-calling, but really, you know,

vile threats to people's lives, to their families, and to those who are around them.

And we've got to change as a country. We've just got to change.

Constituency surgeries where MPs meet voters to discuss local issues are a long-standing

...