David Livingstone was a Scottish doctor, Congregationalist, pioneer Christian missionary with the London Missionary Society, and an explorer in Africa. Livingstone was married to Mary Moffat Livingstone, from the prominent 18th-century Moffat missionary family. Livingstone came to have a mythic status as a Protestant missionary martyr, working-class "rags-to-riches" inspirational story, scientific investigator and explorer, imperial reformer, anti-slavery crusader, and advocate of British commercial and colonial expansion. As a result, he became one of the most popular British heroes of the late 19th-century Victorian era.