yes, christianity was introduced to ethiopia in the first century, shortly after jesus' crucifixion. it spread to the ethiopian court and nobility quickly. the commoners remained pagan until the fifth century when banished miaphysite scholars, who took the losing side of a christological issue during the ecumenical council of chalcedon in ad 451, fled to ethiopia and began founding monasteries. to this day ethiopia has a deep tradition of monasticism with at least hundreds of active monasteries in the country ranging from great to small. there are also lone anchorites who live in the wilderness in the tradition of john the baptist.  "miaphysis" just means "one nature." the diophysite (two nature) side won out in the council and the persistent miaphysites had to flee for their lives. the one or two natures refer to christ being either both god and man in a single nature or being god in one nature and man in another, thus having two distinct natures or essences.
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