This book explores what might happen if an alien civilisation were to come to Earth, their technological knowledge being so far in advance of humankind that there’s no point in military resistance. In fact, the alien political and social engineering is so masterful that there’s no long-lived resistance of any kind. Fortunately, they use their abilities for good, eradicating wars and bring prosperity to all. It seems to be a utopia – everyone is free to explore whatever they want. However, exploration into space is prohibited until one human manages to stow away on a ship back to the mother planet. He gains a fresh perspective, both on humanity’s role in the galaxy and also the fate of the planet when he returns to Earth.
The frustration of this book is that the Overloads turn out to be less powerful that it first appears, they are not the premier, master-race in the galaxy, but themselves report to an Overmind. Their role is indeed benevolent, but both their own future and that of mankind are limited. As per the title of the book, the end of childhood is in sight whilst the Overload guardians watch over the humans, looking out for signs of the beginning of the end.