There is so much we need to build right now. The housing crunch has spread across the country; by one estimate, we’re a few million units short. And we also need a huge build-out of renewable energy infrastructure — at a scale some experts compare to the construction of the Interstate highway...

Back in 2018, Dario Amodei worked at OpenAI. And looking at one of its first A.I. models, he wondered: What would happen as you fed an artificial intelligence more and more data? He and his colleagues decided to study it, and they found that the A.I. didn’t just get better with more data; it got...

The internet is in decay. Do a Google search, and there are so many websites now filled with slapdash content contorted just to rank highly in the algorithm. Facebook, YouTube, X and TikTok all used to feel more fun and surprising. And all these once-great media companies have been folding or...