The growing anti-slavery movement in Britain encouraged more Christian missionary fervor; spurred most famously by the speech David Livingston gave in 1857 appealing for England to send missionaries, workmen and poor relations to Africa.
Ukuwaji wa harakati dhidi ya utumwa ndani ya Uingereza ulishajiisha raghba ya wamisionari wakiristo, ikikuzwa na hotuba ya David Livingstone aliyoitoa mwaka 1857 akiomba Uingereza kupeleka wamisionari na wafanyakazi Afrika. David Livingstone alilingania kwamba mwisho wa utumwa utakuwepo tu kupitia biashara na ukiristo.