Why was he chosen to be the last messenger? Arent more messengers required as the world has changed a lot in recent times. For example who is to tell us if human cloning and genetic modelling is moral or not? Who is to tell us if killing a genetically modified foetus to make vaccination to cure disease is moral or not? Why do you think a new messenger from God is not required to cover all the newly emerged aspects of Human civilization that noone could think about 1000 years ago? Why was PBUH the last messenger? I dont understand, why did he come at a time when Jesus Christs teachings were sufficient and no messenger was required?