I'm thinking of Gandhi. As far as I know, he never wrote a poem. But his life was one of the greatest poems ever. His poem's theme was nonviolence. I would say its theme was LOVE, love of self and of everyone else. He defied despots not with guns, but with the steel of love. He walked to the sea with thousands. He never fought with hate, but by fasting 'til death, if need be. His net worth was $1 when he was shot dead. He was the richest man on Earth, and one of the greatest poets ever.