Mark Doyle, a BBC correspondent who spent nearly three decades bearing witness to Africa's most devastating conflicts, died this week at 67 after a brief illness. He was among that rare breed of journalist who remained when others departed — in Rwanda during the genocide of 1994, in Sierra Leone through years of civil war — not merely to report events but to render them human. His work was credited with influencing British military intervention that saved thousands of lives, a reminder that journalism, at its most committed, can alter the course of history.