Childhood's End. by Arthur C. Clarke (1953)
Every species, sooner or later, needs to evolve.
One of the best narratives I have ever read. A great story about human desire, evolution, curiosity and fear of the unknown. It covers a big range of topics such as utopia boredom, reflections of one’s existence and the possibilities of the future, and offers many points of view through a series of characters and arcs.