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 South Asian monsoon is more than just a weather system.

Its rhythms control the region's agriculture, its annual supply of fresh water, and ultimately

the fortunes of well over a billion people.

As climate change disrupts those rhythms, South Asians must change with them.

And there's been another change of style for Taylor Swift.

The singer has long had a treacherous relationship with streaming services.

The last time she released an album, it didn't go live on Spotify for three weeks.

Now everything has changed, and the love story is back on.

First up, though.

In a debate earlier this month,

Democratic contender Elizabeth Warren

proposed a new direction for American nuclear policy,

committing to what's called no first use. In January,

she'd introduced a Senate bill to mandate it. Those who support a policy of no first use or

NFU say its absence means there's more risk of accidental nuclear war. We increase the odds

that there will be a miscalculation and that someone will believe that

we have used nuclear weapons or sent them in their direction when that is not the case.

This is about trying to keep America safer, not about playing politics.

NFU pledges are common.

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