Time Enough for Love is a science fiction novel by American writer Robert A. Heinlein, first published in 1973. The book made the shortlist for the Nebula, Hugo and Locus awards for best science fiction novel of that year, although it did not win. It did win a retrospective Libertarian Futurist Society award: the Prometheus Hall of Fame award for 1988.

Robert Anson Heinlein was an American science fiction author, aeronautical engineer, and naval officer. Sometimes called the "dean of science fiction writers", he was among the first to emphasize scientific accuracy in his fiction, and was thus a pioneer of the subgenre of hard science fiction. His published works, both fiction and non-fiction, express admiration for competence and emphasize the value of critical thinking. His plots often posed provocative situations which challenged conventional social mores. His work continues to have an influence on the science-fiction genre, and on modern culture more generally.