Rebirth after death, sometimes based on performance in a previous life.
"(2) Mali would have flourished without Mansa Musa’s influence" is an opinion rather than a fact since there is no way of proving that this would have happened.
The Church court dealt mainly with moral crimes. This was when an accused person claimed the right to be tried in the more lenient Church courts. In theory, this right was intended only for priests.
The historical things that you look at in the movie can give a lot of things away, and also the events that happens shows you that it’s in the Middle Ages when actions or things were done that way