Hello and welcome to the Intelligence on Economist Radio. I'm your host, Jason Palmer. Every weekday, we provide a fresh perspective on the events shaping your world.

Alexei Navalny, Russia's opposition leader, is still in Berlin after a near-death experience.

Our correspondent sits down with him for a long chat about the attempt on his life, his place in history, and President Vladimir Putin's fading regime.

And the speedy global spread of mobile internet has made it possible to do some fascinating social science.

We look into a before-and-after study that shows where and how much internet access has eroded citizens' faith in their governments.

But first...

Today, France's president Emmanuel Macron will lead a national tribute to commemorate the

life of Samuel Patti, a teacher who was beheaded last week.

Earlier this month, Patti showed his pupils cartoons of the Prophet Muhammad in a class

on freedom of expression, angering a number of Muslim parents.

The attack happened on Friday in a leafy suburb northwest of central Paris near the school

where Mr. Patti taught.

The 18-year-old perpetrator, a refugee of Chechen origin, was shot dead by police soon after.

Fifteen people have been detained in connection with the murder, including four students.

Speaking yesterday, Mr. Macron vowed to crack down on jihadism. He said French citizens must be protected against the evil that is radical Islam.

...the evil that is radical Islam. Since Mr. Patti's death, tens of thousands of people have rallied across France in solidarity.

And in defense of the values the country holds dear.

I think the French are in a state of absolute shock.

It's an unspeakable murder in any circumstances.

Sophie Patter is our Paris bureau chief.

But in particular, because it really feels to the French,

that it goes to the heart of what their country stands for

...