Time Enough for Love: The Lives of Lazarus Long was published by G.P. Putnam’s Sons in 1973 and is Heinlein’s longest, most structurally complex, and most philosophically ambitious novel. Lazarus Long (born Woodrow Wilson Smith in 1912) has lived for over two thousand years thanks to a combination of genetic selection and rejuvenation technology. He has decided to die — not from despair but from simple boredom. His family and friends persuade him to postpone death long enough to record his memoirs, which become the novel.
The Novel
The book is a patchwork of narrative modes: frame story (Lazarus narrating to his descendants), embedded novellas (stories from his various lives), philosophical dialogues, letters, and the “Notebooks of Lazarus Long” — aphorisms and observations that became famous independently of the novel (“A human being should be able to change a diaper, plan an invasion, butcher a hog, conn a ship, design a building, write a sonnet, balance accounts, build a wall, set a bone, comfort the dying, take orders, give orders, cooperate, act alone, solve equations, analyze a new problem, pitch manure, program a computer, cook a tasty meal, fight efficiently, die gallantly. Specialization is for insects.”).
The novel includes episodes that push against every conventional taboo: Lazarus falls in love with and sleeps with his own mother (through time travel to 1917); he raises two female clones of himself and eventually marries them; he conducts group marriages spanning centuries. Heinlein presents these situations without apology, as logical extensions of a life lived long enough to exhaust all conventional relationships.
The Lazarus Long Universe
Lazarus Long first appeared in Methuselah’s Children (1941/1958) as one of the Howard Families — a group of long-lived humans bred through selective mating. Time Enough for Love is the central novel in a sequence that includes The Number of the Beast (1980), The Cat Who Walks Through Walls (1985), and To Sail Beyond the Sunset (1987). Across these novels, Heinlein constructed a multiverse in which all his fictional universes are connected and his characters can cross between them. Time Enough for Love provides the philosophical foundation for this later work: if a man lives long enough, Heinlein argues, he will eventually encounter every possible variation of human experience.
Critical Reception and Controversy
The novel deeply divided Heinlein’s readership. Admirers considered it his richest and most intellectually adventurous work — a novel that asked fundamental questions about mortality, identity, and love with the courage to pursue uncomfortable answers. Critics — including many Heinlein fans — found the incest and taboo-breaking material self-indulgent, the philosophical dialogues tedious, and the novel bloated. The “Notebooks of Lazarus Long” were universally praised, and their aphorisms entered the culture as standalone quotations.
The novel marked Heinlein’s definitive break from the relatively disciplined storytelling of his earlier career (Starship Troopers, The Moon Is a Harsh Mistress) into the expansive, discursive, sexually provocative mode that would characterise his late work. Readers tend to be passionate on both sides: those who love late Heinlein consider Time Enough for Love his masterpiece; those who prefer early Heinlein consider it the beginning of his decline.
Collecting Time Enough for Love
First edition (1973, G.P. Putnam’s Sons, New York): Blue cloth binding with dust jacket.
Approximate market values:
- Fine/Fine in dust jacket: $600–$2,000
- Near Fine/Very Good jacket: $200–$600
- Signed first edition: $1,500–$5,000
- Without jacket: $50–$150
Value trajectory (2016–2026): Approximately 2× appreciation. Heinlein’s market has been driven by the scarcity of signed copies — he died in 1988 and was not a prolific signer — and by nostalgia-driven demand from readers who grew up on his work.
Projected values (2026–2036): Strong continued appreciation. As the central novel of Heinlein’s most ambitious project, it will always command a premium. Signed copies should reach $5,000–$10,000.
Frequently Asked Questions
Is this Heinlein’s best novel? Opinions divide sharply. Readers who value tight plotting prefer The Moon Is a Harsh Mistress or Starship Troopers. Readers who value ambition and philosophical range prefer Time Enough for Love. It is certainly his most personal novel — the aphorisms of Lazarus Long are widely understood as Heinlein’s own views, barely disguised.
What are the “Notebooks of Lazarus Long”? A collection of aphorisms scattered through the novel, later published separately as a small book. They include some of the most quoted lines in science fiction: “Never attribute to malice that which can be adequately explained by stupidity,” “A generation which ignores history has no past — and no future,” and the “Specialization is for insects” passage quoted above.
Does the incest material ruin the novel? For some readers, yes. For Heinlein, the taboo-breaking was deliberate and philosophically motivated: if a person lives for two thousand years, conventional sexual morality — designed for a species with a seventy-year lifespan — becomes meaningless. Whether you find this argument persuasive or self-serving is largely a matter of temperament.