Who Was Haile Selassie and What did He do? Can He Claim the Davidic Line? Was He Christ Reincarnate?

There is an ancient prophecy that foretells of a kingly dynasty that shall never be abolished, a dynasty that was to come from the hereditary line of King David. Ethiopians claim this lineage today – by way of their former Emperor. Additionally, the Rastafarian movement have associated this person with the second coming of Christ. How true are these claims? Who Was Haile Selassie? What did he do?