Complex sentence: A slave owner, having inherited overseas estates, the Countess promoted the writings and independence of formerly enslaved Africans who espoused religious views compatible with her own including authors Ukawsaw Gronniosaw, Phillis Wheatley and Olaudah Equiano.
Split into simpler sentences: A slave owner herself, having inherited overseas estates, the Countess promoted the writings and independence of formerly enslaved Africans who espoused religious views compatible with her own. This included authors such as Ukawsaw Gronniosaw, Phillis Wheatley and Olaudah Equiano.