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.

The countries involved in the African slave trade continue to come to terms with its legacy.

Following America's lead, academics in Britain are now reckoning with how much the slave economy built the country's universities, and how to make amends.

And, you know those flashing advertising hoardings that surround the field in televised sports?

The ads you see might already be different from those in different countries.

Soon, the person right next to you might get a different set, too.

But first...

During the Gulf War of 1991,

tens of thousands of anti-personnel landmines were showered over Kuwait and Iraq by American planes.

That was the last time America made significant use of the devices,

designed to kill or injure soldiers on foot.

But nearly three decades on, a ruling by the Trump administration suggests that the weapons could make something of a comeback.

Anti-personnel landmines were banned 23 years ago under the Ottawa Mine Ban Treaty of 1997.

Shishonk Joshi is our defense editor. It was a cause that was famously championed by Princess Diana.

The world is too little aware of the waste of life, limb, and land, which anti-personal landmines

are causing...

It was a cause that was signed by dozens of countries.

It now has 164 parties.

And since then, deaths from landmines, the use of landmines has plummeted.

But not everyone everywhere signed up to that Ottawa Treaty.

...