Life Exposed in Riverworld In the Riverworld series, Philip Jose Farmer grapples with many aspects of human nature. The series is not about the evolution of humanity, nor mankind's instinctive desire to become dominant over nature. It is actually about spiritual reformation, and the quest to make oneself a better person. Through the failure of Samuel Clemens' quest, the triumph of Richard Burton's journey, and the revelation of the purpose behind the creation of Riverworld, Farmer is suggesting