The Maravi confederacy that named the country had its own sacred geography, centred on territorial spirit shrines of which the greatest, the M'bona shrine at Khulubvi in the lower Shire valley, still receives offerings for rain through a hereditary priesthood, a cult studied by scholars as one of the best documented African territorial religions. The nineteenth century rewired everything. Swahili and Yao traders tied the lake to the coast, and with the trade came Islam, which the Yao adopted widely enough that the lakeshore and the south remain Muslim heartlands.
In the same decades David Livingstone's reports summoned Scottish missions to the highlands, Livingstonia in the north and Blantyre in the south, whose schools produced much of the nationalist elite, while the Catholic White Fathers and Montfort missionaries built a church that is today the country's largest single denomination.
Independent Christianity has deep roots too, from Watchtower preachers to the prophetic healing churches that flourish now. The churches never fully left politics: the Presbyterian and Catholic hierarchies' 1992 pastoral letter against Hastings Banda's dictatorship is widely credited with opening the door to multiparty rule, and pulpits remain a genuine public square in one of the world's most observant countries.