Complex sentence: Although disenchanted with the colonial effort, Haggard remained committed to this belief, believing that the British "alone of all the nations in the world appear to be able to control coloured races without the exercise of cruelty".
Split into simpler sentences: Although disenchanted with the colonial effort, Haggard remained committed to this belief. He believed that the British "alone of all the nations in the world appear to be able to control coloured races without the exercise of cruelty".