Overview
Asimov's career can be divided into several time periods. His early career, dominated by science fiction, began with short stories in 1939 and novels in 1950. This lasted until about 1958, all but ending after publication of The Naked Sun. He began publishing nonfiction in 1952, co-authoring a college-level textbook called Biochemistry and Human Metabolism. Following the brief orbit of the first man-made satellite Sputnik I by the USSR in 1957, his production of nonfiction, particularly popular science books, greatly increased, with a consequent drop in his science fiction output.
Four novels in 15 years
Over the next quarter century, he would write only four science fiction novels. Starting in 1982, the second half of his science fiction career began with the publication of Foundation's Edge. From then until his death, Asimov would publish several sequels and prequels to his existing novels, tying them together in a way he had not originally anticipated.
In his own view, Asimov believed that his most enduring contributions would be his "Three Laws of Robotics" and the Foundation Series (see Yours, Isaac Asimov, p. 329). Furthermore, the Oxford English Dictionary credits his science fiction for introducing the words positronic (an entirely fictional technology), psychohistory (frequently used in a different sense than the imaginary one Asimov employed) and robotics into the English language. Asimov coined the term robotics without suspecting that it might be an original word; at the time, he believed it was simply the natural analogue of mechanics, hydraulics and so forth. (The original word robot derives from the Czech word for "forced labor", robota, and was first employed by the playwright Karel Capek.) Unlike his other two coinages, the word robotics continues in mainstream and technical use with Asimov's original definition.
Science fiction
Asimov began contributing stories to science fiction magazines in 1939, "Marooned Off Vesta" being his first published story, written when he was 18. Two and a half years later, he published his 32nd short story, "Nightfall" (1941), which has been described as one of "the most famous science-fiction stories of all time". In 1968 the Science Fiction Writers of America voted "Nightfall" the best science fiction short story ever written. In his short anthology Nightfall and Other Stories he wrote, "The writing of 'Nightfall' was a watershed in my professional career ...
I was suddenly taken seriously and the world of science fiction became aware that I existed. As the years passed, in fact, it became evident that I had written a 'classic'"."Nightfall" is an archetypical example of social science fiction, a term coined by Asimov to describe a new trend in the 1940's, led by authors including Asimov and Heinlein, away from gadgets and space opera and toward speculation about the human condition.
A later edition of Second Foundation
In 1942 he began his Foundation stories—later collected in the Foundation Trilogy: Foundation (1951), Foundation and Empire (1952), and Second Foundation (1953)—which recount the collapse and rebirth of a vast interstellar empire in a universe of the future. Taken together, they are his most famous work of science fiction, along with the Robot Series. Many years later, he continued the series with Foundation's Edge (1982) and Foundation and Earth (1986) and then went back to before the original trilogy with Prelude to Foundation (1988) and Forward the Foundation (1992).
Robot stories
The series features his fictional science of Psychohistory in which the future course of the history of large populations can be predicted.His robot stories—many of which were collected in I, Robot (1950)—were begun at about the same time. They promulgated a set of rules of ethics for robots (see Three Laws of Robotics) and intelligent machines that greatly influenced other writers and thinkers in their treatment of the subject. One such short story, "The Bicentennial Man", was made into a movie starring Robin Williams.
The recent film I, Robot, starring Will Smith, was based on the Hardwired script by Jeff Vintar with Asimov's ideas incorporated later after acquiring the rights to the I, Robot title. It is not related to the I, Robot script by Harlan Ellison, who collaborated with Asimov himself to create a version that captured the spirit of the original. Asimov is quoted as saying that Ellison's screenplay would lead to "the first really adult, complex, worthwhile science fiction movie ever made". The screenplay was published in book form in 1994, after hopes of seeing it in film form were becoming slim. See: I, Robot
Besides movies, his Foundation and robot stories have inspired other derivative works of science fiction literature, many by well-known and established authors such as Roger MacBride Allen, Greg Bear, and David Brin. These appear to have been done with the blessing, and often at the request of, Asimov's widow Janet Asimov.In 1948 he also wrote a spoof science article, "The Endochronic Properties of Resublimated Thiotimoline". At the time, Asimov was preparing for his own doctoral dissertation. Fearing a prejudicial reaction from his Ph.D. evaluation board, he asked his editor that it be released under a pseudonym, yet it appeared under his own name. During his oral examination shortly thereafter, Asimov grew concerned at the scrutiny he received.
"Dr. Asimov"
At the end of the examination, one evaluator turned to him, smiling, and said "Mr. Asimov, tell us something about the thermodynamic properties of the compound thiotimoline." After a twenty-minute wait, he was summoned back into the Examination Room and congratulated as "Dr. Asimov."He continued writing short stories for science fiction magazines in the 1950s, which he referred to as his golden decade. A number of these are included in his Best of anthology, including "The Last Question" (1956), on the ability of humankind to cope with and reverse entropy. It was his personal favorite and considered by many to be a contender to "Nightfall". Asimov wrote of it in 1973.
Then, too, it has had the strangest effect on my readers. Frequently someone writes to ask me if I can give them the name of a story, which they think I may have written, and tell them where to find it. They don't remember the title but when they describe the story it is invariably "The Last Question". This has reached the point where I recently received a long-distance phone call from a desperate man who began, "Dr. Asimov, there's a story I think you wrote, whose title I can't remember—" at which point I interrupted to tell him it was "The Last Question" and when I described the plot it proved to be indeed the story he was after. I left him convinced I could read minds at a distance of a thousand miles.
Beginning in 1977, he lent his name to Isaac Asimov's Science Fiction Magazine (now Asimov's Science Fiction) and penned an editorial for each issue. There was also a short-lived Asimov's SF Adventure Magazine and a companion Asimov's Science Fiction Anthology reprint series, published as magazines (in the same manner as stablemates Ellery Queen's Mystery Magazine and Alfred Hitchcock's Mystery Magazine's "anthologies").
Popular science

During the late 1950s and 1960s, Asimov shifted gears somewhat, and substantially decreased his fiction output (he published only four adult novels between 1957's The Naked Sun and 1982's Foundation's Edge, two of which were mysteries). At the same time, he greatly increased his non-fiction production, writing mostly on science topics; the launch of Sputnik in 1957 engendered public concern over a "science gap", which Asimov's publishers were eager to fill with as much material as he could write.
Meanwhile, the monthly Magazine of Fantasy and Science Fiction invited him to continue his regular non-fiction column, begun in the now-folded bimonthly companion magazine Venture Science Fiction, ostensibly dedicated to popular science, but with Asimov having complete editorial freedom. The first of the F&SF columns appeared in November of 1958, and they followed uninterrupted thereafter, with 399 entries, until Asimov's terminal illness took its toll.
These columns, periodically collected into books by his principal publisher, Doubleday, helped make Asimov's reputation as a "Great Explainer" of science and were referred to by him as his only pop-science writing in which he never had to assume complete ignorance of the subjects at hand on the part of his readers. The popularity of his first wide-ranging reference work, The Intelligent Man's Guide to Science, also allowed him to give up most of his academic responsibilities and become essentially a full-time freelance writer.
Asimov's Guide to the Bible
He published Asimov's Guide to the Bible in two volumes—covering the Old Testament in 1967 and the New Testament in 1969—and then combined them into one 1300-page volume in 1981. Replete with maps and tables, the guide goes through the books of the Bible in order, explaining the history of each one and the political influences that affected it, as well as biographical information about the important characters.Asimov also wrote several essays on the social contentions of his day, including "Thinking About Thinking" and "Science: Knock Plastic" (1967).
The great variety of information covered in Asimov's writings once prompted Kurt Vonnegut to ask, "How does it feel to know everything?" Asimov replied that he only knew how it felt to have the reputation of omniscience—"Uneasy". (See In Joy Still Felt, chapter 30.) In the introduction to his story collection Slow Learner, Thomas Pynchon admitted that he relied upon Asimov's science popularizations (and the Oxford English Dictionary) to provide his knowledge of entropy.
History interests
In addition to his interest in science, Asimov was also greatly interested in history. Starting in the 1960s, he wrote fourteen popular history books, most notably The Greeks: A Great Adventure (1965), The Roman Republic (1966) and The Roman Empire (1967).Never entirely lacking wit and humor, towards the end of his life Asimov published a series of collections of limericks, mostly written by himself, starting with Lecherous Limericks, which appeared in 1975.
Limericks: Too Gross, whose title displays Asimov's love of puns, contains 144 limericks by Asimov and an equal number by John Ciardi. Asimov's Treasury of Humor is both a working joke book and a treatise propounding his views on humor theory. According to Asimov, the most essential element of humor is an abrupt change in point of view, one that suddenly shifts focus from the important to the trivial, or from the sublime to the ridiculous.Particularly in his later years, Asimov to some extent cultivated an image of himself as an amiable lecher. In 1971, as a response to the popularity of sexual guidebooks such as The Sensuous Woman (by "J") and The Sensuous Man (by "M"),
Asimov published The Sensuous Dirty Old Man under the byline "Dr. 'A'", but with his full name prominently displayed on the cover.Asimov published two volumes of autobiography: In Memory Yet Green (1979) and In Joy Still Felt (1980). A third autobiography, I. Asimov: A Memoir, was published in April 1994. The epilogue was written by his widow Janet Asimov shortly after his death. It's Been a Good Life (2002), edited by Janet, is a condensed version of his three autobiographies.
Literary themes
Much of Asimov's fiction dealt with themes of paternalism. His first robot story, "Robbie", concerned a robotic nanny. As the robots grew more sophisticated, their interventions became more wide-reaching and subtle. In "Evidence", a robot masquerading as a human successfully runs for elective office. In "The Evitable Conflict", the robots run humanity from behind the scenes, acting as nannies to the whole species.
I, Robot, starring Will Smith
Later, in Robots and Empire, a robot develops what he calls the Zeroth Law of Robotics, which states that "A robot may not injure humanity, nor, through inaction, allow humanity to come to harm". He also decides that robotic presence is stifling humanity's freedom, and that the best course of action is for the robots to phase themselves out. A non-robot novel, The End of Eternity, features a similar conflict and resolution.In The Foundation Series (which did not originally have robots), a scientist implements a semi-secret plan to create a perfect society over the course of 1000 years. This series has its version of Platonic guardians, called the Second Foundation, to perfect and protect the plan.
Benign protectors of humanity
When Asimov stopped writing the series in the 1950s, the Second Foundation was depicted as benign protectors of humanity. When he revisited the series in the 1980s, he made the paternalistic themes even more explicit.Foundation's Edge introduced the planet Gaia, obviously based on the Gaia hypothesis. Every animal, plant, and mineral on Gaia participated in a shared consciousness, forming a single super-mind working together for the greater good. In Foundation and Earth, the protagonist must decide whether or not to allow the development of Galaxia, a larger version of Gaia, encompassing the entire galaxy.F
oundation and Earth introduces robots to the Foundation universe. Two of Asimov's last novels, Prelude to Foundation and Forward the Foundation, explore their behavior in fuller detail. The robots are depicted as covert operatives, acting for the benefit of humanity.Another frequent theme, perhaps the reverse of paternalism, is social oppression. The Currents of Space takes place on a planet where a unique plant fiber is grown; the agricultural workers there are exploited by the aristocrats of a nearby planet. In The Stars, Like Dust, the hero helps a planet that is oppressed by an arrogant interplanetary empire, the Tyranni.Often the victims of oppression are either Earth people (as opposed to colonists on other planets) or robots.
"The Bicentennial Man"
In "The Bicentennial Man", a robot fights prejudice to be accepted as a human. In The Caves of Steel, the people of Earth resent the wealthier "Spacers" and in turn treat robots (associated with the Spacers) in ways reminiscent of how whites treated blacks, such as addressing robots as "boy". Pebble in the Sky shows an analogous situation: the Galactic Empire rules Earth and its people use such terms as "Earthie-squaw", but Earth is a theocratic dictatorship that enforces euthanasia of anyone older than sixty. One hero is Bel Arvardan, an upper-class Galactic archeologist who must overcome his prejudices.
The other is Joseph Schwartz, a 62-year-old twentieth-century American who had emigrated from Europe, where his people were persecuted (he is quite possibly Jewish), and is accidentally transported forward in time to Arvardan's period. He must decide whether to help a downtrodden society that thinks he should be dead.Yet another frequent theme in Asimov is rational thought. He invented the science-fiction mystery with the novel The Caves of Steel and the stories in Asimov's Mysteries, usually playing fair with the reader by introducing early in the story any science or technology involved in the solution.
Later, he produced non-SF mysteries, including the novel Murder at the ABA (1976) and the "Black Widowers" short stories, in which he followed the same rule. In his fiction, important scenes are often essentially debates, with the more rational, humane—or persuasive—side winning.