After education at Cordwalles Preparatory School, Michaelhouse in Natal and Rhodes University, in the Eastern Cape of South Africa, he became a journalist, writing about social conditions in South Africa, but his father's advice to "Get a real job" prompted him to resentfully become a tax accountant. His publisher and eventually agent, Charles Pick, later gave him advice he never forgot: "Write for yourself, and write about what you know best."
Wilbur states that Africa is his major inspiration, and currently he has over 30 novels published. Smith now lives in London, but avows an abiding concern for the peoples and wildlife of his native continent.