Theodore Roosevelt

The name tends to reach people now through the conservation record — the national parks — and through a brand of progressive politics that treated reform as something you argued for in public rather than assumed. He was a reformer and a conservationist, and his work reframed the basic questions in both areas rather than simply adding to them.

He was born in New York City in 1858. What the record emphasises about his development is habit: disciplined reflection, careful exposition, an early insistence that rigour of thought and clarity of language belonged together. Alongside politics he worked as an explorer and historian, and his writing shows that combination widening over time — the mid-career material takes on historical, social and technical complexity that the earlier work did not attempt.

Opposition shaped him. Dispute with opponents forced sharper methods and more exact statements of principle, which is a large part of why the arguments hold up on the page. By his later years he had become a reference point for others, holding a working balance between innovation and continuity. He died in 1919. The body of work has lasted less as a record of positions than as a way of asking questions.