What is the main conflict in Speaker for the Dead by Orson Scott Card?

Speaker for the Dead is the sequel to Orson Scott Card's sci-fi adventure, Ender's Game. Speaker for the Dead takes place several thousand years after the extermination of the alien race, the buggers. A new alien race has been discovered on a newly populated planet, Luisitania. The members of the Luisitania colony have been given permission to study this new race, but are forbidden to influence the evolution of the alien race. However, the true trouble begins after one of those trusted to study the new aliens is found murdered in a disturbing way. Ender himself learns of the murder and comes to the planet to investigate, revealing not only the truth about the alien race, but also revealing some hard to accept truths about the colonists who reside on the planet. Speaker for the Dead is a novel of sin and redemption that will please sci-fi and mainstream fans alike.