This question was answered by Skrskr1717 Ambitious
papermaking, gunpowder, compass
Christianity.
This is shown when he conquers the Saxons of the North, he had convert them to Christianity. This is further proven as he encouraged church-based education. Thus, overall, showing that he spread Christianity to lands that he conquered.
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Shakespeare's use of supernatural elements and eerie sounds contributes to the mood of Macbeth.