Book excerpt: This book will appeal to everyone who reads science fiction or thinks about science and its impact on our lives. It raises profound economic, ethical, political, sociological, and psychological questions. It explores our fears and fantasies as it examines a range of fictions, films, and TV programs that speculate about the possibilities of humans in the future. The contributions here ask central questions that have provoked the creators and readers of science fiction since Mary Shelley inaugurated the genre with her novel Frankenstein. What are the aims and limits of science and technology? What are our responsibilities toward the products of our advancing science and technology? What kinds of creatures will we produce or encounter in the future? What rights will we grant to these creatures or – more worryingly – will they grant to us? Do science and technology make us more civilized or more barbaric? How should we treat each other? Ultimately, what does it mean to be human?