Gone! quite gone! the way that everything must go. Like the nobles and the ladies who lived within their gates, these cities have had their day, and now they are as Babylon and Nineveh, and as London and Paris will one day be. Nothing may endure. That is the inexorable law. Men and women, empires and cities, thrones, principalities, and powers, mountains, rivers, and unfathomed seas, worlds, spaces, and universes, all have their day, and all must go. In this ruined and forgotten place the moralist may behold a symbol of the universal destiny. For this system of ours allows no room for standing still—nothing can loiter on the road and check the progress of things upwards towards Life, or the rush of things downwards towards Death. The stern policeman Fate moves us and them on, on, uphill and downhill and across the level; there is no resting-place for the weary feet, till at last the abyss swallows us, and from the shores of the Transitory we are hurled into the sea of the Eternal....
After returning to England in 1882, Haggard published a book on the political situation in South Africa, as well as a handful of unsuccessful novels, before writing the book for which he is most famous, King Solomon's Mines. He accepted a 10% royalty rather than £100 for the copyright.
A sequel soon followed entitled Allan Quatermain, followed by She and its sequel Ayesha, swashbuckling adventure novels set in the context of the Scramble for Africa (although the action of Ayesha happens in Tibet). The hugely popular King Solomon's Mines is sometimes considered the first of the Lost World genre. She is generally considered to be one of the classics of imaginative literature. and with 83 million copies sold by 1965, it is one of the best-selling books of all time. He is also remembered for Nada the Lily (a tale of adventure among the Zulus) and the epic Viking romance, Eric Brighteyes.
His novels portray many of the stereotypes associated with colonialism, yet they are unusual for the degree of sympathy with which the native populations are portrayed. Africans often play heroic roles in the novels, although the protagonists are typically European (though not invariably). Notable examples are the heroic Zulu warrior Umslopogaas and Ignosi, the rightful king of Kukuanaland, in King Solomon's Mines. Having developed an intense mutual friendship with the three Englishmen who help him regain his throne, he accepts their advice and abolishes witch-hunts and arbitrary capital punishment.
Three of Haggard's novels were written in collaboration with his friend Andrew Lang who shared his interest in the spiritual realm and paranormal phenomena.
Haggard also wrote about agricultural and social reform, in part inspired by his experiences in Africa, but also based on what he saw in Europe. At the end of his life, he was a staunch opponent of Bolshevism, a position that he shared with his friend Rudyard Kipling. The two had bonded upon Kipling's arrival at London in 1889 largely on the strength of their shared opinions, and the two remained lifelong friends.