Stephen Hawking

Most people meet his name through the physics of black holes — the idea that they radiate — and through cosmology, the study of the universe at its largest scale. That is the work his reputation rests on. But the thing that made him quotable, and the reason clips of him still circulate, was a habit of insisting that difficult ideas be made intelligible. Clarity was not a bonus in his output; by his own practice it was the point.

He was born in Oxford in 1942 and worked as a theoretical physicist and cosmologist, and also as a populariser — someone who took the technical apparatus of a field and translated it for audiences outside it. The pattern in his early work was to question assumptions that had been inherited rather than tested, and to reframe problems into forms that could actually be handled. Reading, travel and correspondence built the working method; collaboration and apprenticeship gave it a craft discipline. His first results stood out less for being new than for being clearly stated.

In mid-career the scope of the problems widened while the technique tightened. Critics and rivals mattered here: the pressure of argument from outside sharpened how he presented and defended his positions. Publications and lectures turned provisional thinking into settled statements, and his approach spread through students and interlocutors well beyond any single institution. He moved between analysis and construction rather than committing to one mode, and treated failed attempts as tests worth having.

Later work leaned towards consolidation — essays, editions and notes that tried to fix the strongest version of the central ideas. He died in 2018. Black hole radiation and cosmology remain the shorthand for his influence, though the drafts and corrections left behind suggest that what he actually passed on was a method rather than a monument.