Good afternoon, here is your selection of eight articles for Thursday. Computer-vision checkouts, weighted shelves, smart surveillance: this is not some dystopian future, but the reality of what it takes to tackle today’s shoplifting epidemic. Is it worth it? You decide. Read the full story then take today’s poll ➼

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FT EXCLUSIVE

Reddit vows to stay human to emerge a winner from artificial intelligence

Chief Steve Huffman warns of an “arms race” to protect its devoted online communities from AI-generated content. Read the full story ➼

IN-DEPTH

US strikes on Iran force China to reconsider Donald Trump’s isolationism

The president’s willingness to use military force prompts a rethink in Beijing over Taiwan. Read the full story ➼

FT IDEAS

America’s retreat from the world stalls again

The bombing of Iran suggests that a global role is a hard thing to give up, writes Janan Ganesh. Read the full story ➼

THE BIG READ

The high-tech fight against shoplifters

Companies are building up an arsenal of antitheft technology as organised crime fuels an epidemic of petty larceny. Read the full story then have your say ➼

INSIGHT

What has happened to Ukraine’s refugees?

Strong labour markets, high education levels and policies allowing immediate work have helped them succeed. Read the full story ➼

WORK/LIFE

The joy of the office packed lunch

Tips from food writers and FT staff show bringing your own doesn’t have to mean limp lettuce and bland microwaved meals. Read the full story ➼

HOUSE & HOME

Seven ways to negotiate on property like a buying agent

When sellers outnumber buyers and asking prices feel out of kilter, there’s an art to getting the best possible reduction. Read the full story ➼

BOOK REVIEW

How Countries Go Broke — Ray Dalio on why timing is everything

The billionaire Bridgewater founder shares his ideas on debt crises and how to predict them. Read the full story ➼