In this book, Stephen R. L. Clark, a philosopher with a lifelong "addiction" to science fiction, explores G. K. Chesterton's ideas and arguments in their historical context and evaluates them philosophically. He addresses Chesterton's sense that the way things are is not how they must have been or need be in the future, and his willingness to face up to the apparent effects of the nihilism he detected in the science and politics of his day.

Clark offers a detailed study of some of Chesterton's works that have been identified by science fiction writers and critics as seminal influences. He attempts to deal with some of Chesterton's theories that have been found offensive or "positively wicked" by later writers and critics, including his arguments against female suffrage and in praise of war, his medievalist leanings, and his contemptuous rejection of Darwinian evolutionary theory.