Everything you need to understand or teach Quest for the Future by A. E. van Vogt.
The events in Quest for the Future are unified by the ideas about immortality.
The novel's society of time travelers has given the desirability of immortality much thought and has concluded that immortality is desirable only if people are psychologically well-adjusted and nonviolent. The main character Peter Caxton has a more fundamental view of immortality and pursues it simply because life seems better than death.
The action of the novel is based on...