The images in Lost Boys can feel haunting, due to the deaths of both author and subjects. But in the end, this is a show that generates considerable power from the process of making present.

Duffield’s clocks helped to support the Protestant notion that one should always be doing, rather than simply being. And in that sense, he was an early architect of our own 24/7 culture, with its similar emphasis on the value of constant productivity.

Wondering what lay beyond, say, the borders of the ancient Roman Empire or the reach of colonial France?

A concise but impactful exhibition of photographs from the 1970s and 1980s at the National Gallery of Art, presents a boisterous and iconoclastic photographic culture