In a dangerous world, cutting-edge missile defence is all the rage

Sugar taxes and obesity drugs will not be enough

The games will test the success of new solutions to old bugbears

The speed and intensity of prospective conflicts could test the laws of war

The undersea cables that connect the world are becoming military targets

Threats to Western alliances lie both within and without the club

Deadly heat is increasingly the norm, not an exception to it

Will rich countries welcome them the way they did Chinese students?

Big powers are preparing for wartime sabotage

Too often politicians tout awful solutions for helping tenants

The world’s atomic watchdog fears a terrifying regional arms race

But China’s bullying of Japan, Taiwan and the Philippines risks an explosion

Human-rights lawyers are trying to save laws meant to tame violent rulers

They are using the war in Gaza to radicalise a new generation

America, China and the battle for supremacy

Military conscription is on the agenda in the rich world

In a dog-eat-dog world, competition is fierce

Mass killings are at their highest level in two decades

Migrants help campaign for the prime minister at home and lobby for the country abroad

Diverging worldviews could affect politics, families and more