Heinlein's books probe a range of ideas about a range of topics such as sexuality, race, politics, and the military. Many were seen as radical or as ahead of their time in their social criticism. His books have inspired considerable debate about the specifics, and the evolution, of Heinlein's own opinions, and have earned him both lavish praise and a degree of criticism. He has also been accused of contradicting himself on various philosophical questions.
Brian Doherty cites William Patterson, saying that the best way to gain an understanding of Heinlein is as a "full-service iconoclast, the unique individual who decides that things do not have to be, and won't continue, as they are". He says this vision is "at the heart of Heinlein, science fiction, libertarianism, and America. Heinlein imagined how everything about the human world, from our sexual mores to our religion to our automobiles to our government to our plans for cultural survival, might be flawed, even fatally so." The critic
Elizabeth Anne Hull, for her part, has praised Heinlein for his interest in exploring fundamental life questions, especially questions about "political power—our responsibilities to one another" and about "personal freedom, particularly sexual freedom".
Edward R. Murrow hosted a series on
CBS Radio called
This I Believe, which solicited an entry from Heinlein in 1952, titled "
Our Noble, Essential Decency". In it, Heinlein broke with the normal trends, stating that he believed in his neighbors (some of whom he named and described), community, and towns across America that share the same sense of good will and intentions as his own, going on to apply this same philosophy to the US, and humanity in general.
Politics Heinlein's political positions shifted throughout his life. Heinlein's early political leanings were
liberal. In 1934, he worked actively for the
Democratic campaign of
Upton Sinclair for
Governor of California. After Sinclair lost, Heinlein became an anti-communist Democratic activist. He made an unsuccessful bid for a
California State Assembly seat in 1938. Of this time in his life, Heinlein later said: Heinlein's fiction of the 1940s and 1950s, however, began to espouse
conservative views. After 1945, he came to believe that a strong
world government was the only way to avoid
mutual nuclear annihilation. Heinlein always considered himself a libertarian; in a letter to Judith Merril in 1967 (never sent) he said, "As for libertarian, I've been one all my life, a radical one. You might use the term '
philosophical anarchist' or '
autarchist' about me, but 'libertarian' is easier to define and fits well enough."
Stranger in a Strange Land was embraced by the 1960s
counterculture, and libertarians have found inspiration in
The Moon Is a Harsh Mistress. Both groups found resonance with his themes of personal freedom in both thought and action. His early novels were ahead of their time both in their explicit rejection of racism and in their inclusion of protagonists of color. In the context of science fiction before the 1960s, the mere existence of characters of color was a remarkable novelty, with green occurring more often than brown. For example, his 1948 novel
Space Cadet explicitly uses aliens as a metaphor for minorities. The 1947 story "
Jerry Was a Man" uses enslaved genetically modified chimpanzees as a symbol for Black Americans fighting for civil rights. In his novel
The Star Beast, the
de facto foreign minister of the Terran government is an undersecretary, a Mr. Kiku, who is from Africa. Heinlein explicitly states his skin is "ebony black" and that Kiku is in an
arranged marriage that is happy. In a number of his stories, Heinlein challenges his readers' possible racial preconceptions by introducing a strong, sympathetic character, only to reveal much later that he or she is of African or other ancestry. In several cases, the covers of the books show characters as being light-skinned when the text states or at least implies that they are dark-skinned or of African ancestry. Heinlein repeatedly denounced racism in his nonfiction works, including numerous examples in
Expanded Universe. Heinlein reveals in
Starship Troopers that the novel's protagonist and narrator,
Johnny Rico, the formerly disaffected scion of a wealthy family, is
Filipino, actually named "Juan Rico" and speaks
Tagalog in addition to English. However, not all of Heinlein's work is successfully anti racist. In the 1941 novel
Sixth Column (also known as
The Day After Tomorrow), a white resistance movement in the United States defends itself against an invasion by an Asian fascist state (the "Pan-Asians") using a "super-science" technology that allows ray weapons to be tuned to specific races. The idea for the story was pushed on Heinlein by editor
John W. Campbell and the story itself was based on a then-unpublished story by Campbell, and Heinlein wrote later that he had "had to re-slant it to remove racist aspects of the original story line" and that he did not "consider it to be an artistic success". However, the novel prompted a heated debate in the scientific community regarding the plausibility of developing
ethnic bioweapons. John Hickman, writing in the
European Journal of American Studies, identifies examples of anti–East Asian racism in some of Heinlein's works, particularly
Sixth Column. The most prominent and problematic example is ''
Farnham's Freehold, which casts a white family into a future in which white people are the slaves of cannibalistic black rulers. Clearly intended as anti-racist (the African American character is easily the most sympathetic) the use of literal cannibalism to make the point about the metaphorical cannibalism of a racist society is considered by most critics to misfire badly. In Time Enough for Love
, Lazarus Long gives a long list of capabilities that anyone should have, concluding, "Specialization is for insects." The ability of the individual to create himself is explored in stories such as I Will Fear No Evil'', "
—All You Zombies—", and "
By His Bootstraps". Heinlein claimed to have written
Starship Troopers in response to "calls for the unilateral ending of nuclear testing by the United States". Heinlein suggests in the book that the Bugs are a good example of Communism being something that humans cannot successfully adhere to, since humans are strongly defined individuals, whereas the Bugs, being a collective, can all contribute to the whole without consideration of individual desire.
The Competent Man A common theme in Heinlein's writing is his frequent use of the "competent man", a
stock character who exhibits a very wide range of abilities and knowledge, making him a form of
polymath. This trope was notably common in 1950s U.S. science fiction. While Heinlein was not the first to use such a character type, the heroes and heroines of his fiction (with
Jubal Harshaw being a prime example) generally have a wide range of abilities, and one of Heinlein's characters,
Lazarus Long, gives a wide summary of requirements: {{blockquote|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. Predecessors of Heinlein's competent heroes include the protagonists of
George Bernard Shaw, like Henry Higgins in
Pygmalion and Caesar in
Caesar and Cleopatra, as well as the citizen soldiers in
Rudyard Kipling's "
The Army of a Dream".
Sexuality and sexual politics For Heinlein, personal liberation included
sexual liberation, and
free love was a major subject of his writing starting in 1939, with
For Us, the Living. During Heinlein's early period, his writing for younger readers needed to take into account the perceptions of sexuality by editors and the buying public; as critic William H. Patterson has put it, his dilemma was "to sort out what was really objectionable from what was only excessive over-sensitivity to imaginary librarians". By his middle period, sexual freedom and the elimination of sexual jealousy became a major theme; for instance, in
Stranger in a Strange Land (1961), the progressively minded but sexually conservative reporter, Ben Caxton, acts as a
dramatic foil for the less parochial characters,
Jubal Harshaw and Valentine Michael Smith (Mike). Another of the main characters, Jill, is homophobic, and says that "nine times out of ten, if a girl gets raped it's partly her own fault." According to
Gary Westfahl, Feminist critic
Farah Mendlesohn has claimed that most of the assertions that Heinlein is problematic for feminists have come from men. Mendlesohn and
Jo Walton argue that Heinlein's stereotypes about women are often written to be undermined, as in 'Delilah and the Spacerigger' (1949), and abuse depicted in order to be challenged, as in
Podkayne of Mars (1963),
Friday (1982) and
To Sail Beyond the Sunset (1987). However, not all feminists agree that Heinlein should be celebrated uncritically. Writer
M.G. Lord recounts her own ambivalence toward Heinlein, particularly with regard to his later novels. Science fiction author
Pat Murphy has described herself as "outraged" by Heinlein. According to Murphy,
Podkayne's protagonist must "alter her aspirations and accept a traditional woman's role."
Nancy Kress asserts that
Friday is dependent on "old stereotypes" about women and rape that she finds repulsive. In books written as early as 1956, Heinlein dealt with incest and the sexual nature of children. Many of his books including
Time for the Stars,
Glory Road,
Time Enough for Love, and
The Number of the Beast dealt explicitly or implicitly with incest, sexual feelings and relations between adults, children, or both. The treatment of these themes include the romantic relationship and eventual marriage of two characters in
The Door into Summer who met when one was a 30-year-old engineer and the other was an 11-year-old girl, and who eventually married when time-travel rendered the girl an adult while the engineer aged minimally, or the more overt intra-familial incest in
To Sail Beyond the Sunset and
Time Enough for Love. Heinlein often posed situations where the nominal purpose of sexual taboos was irrelevant to a particular situation, due to future advances in technology. For example, in
Time Enough for Love Heinlein describes a brother and sister (Joe and Llita) who were mirror twins, being complementary diploids with entirely disjoint genomes, and thus not at increased risk for unfavorable gene duplication due to
consanguinity. In this instance, Llita and Joe were props used to explore the concept of incest, where the usual objection to incest—heightened risk of genetic defect in their children—was not a consideration. Peers such as
L. Sprague de Camp and
Damon Knight have commented critically on Heinlein's portrayal of incest and pedophilia in a lighthearted and even approving manner.
Philosophy In
To Sail Beyond the Sunset, Heinlein has the main character,
Maureen, state that the purpose of
metaphysics is to ask questions: "Why are we here?" "Where are we going after we die?" (and so on); and that you are not allowed to answer the questions.
Asking the questions is the point of metaphysics, but
answering them is not, because once you answer this kind of question, you cross the line into religion. Maureen does not state a reason for this; she simply remarks that such questions are "beautiful" but lack answers. Maureen's son/lover Lazarus Long makes a related remark in
Time Enough for Love. In order for us to answer the "big questions" about the universe, Lazarus states at one point, it would be necessary to stand
outside the universe. During the 1930s and 1940s, Heinlein was deeply interested in
Alfred Korzybski's
general semantics and attended a number of seminars on the subject. His views on
epistemology seem to have flowed from that interest, and his fictional characters continue to express Korzybskian views to the very end of his writing career. Many of his stories, such as
Gulf,
If This Goes On—, and
Stranger in a Strange Land, depend strongly on the premise, related to the well-known
Sapir–Whorf hypothesis, that by using a correctly
designed language, one can change or improve oneself mentally, or even realize untapped potential (as in the case of Joe in
Gulf—whose last name may be Greene, Gilead or Briggs). When
Ayn Rand's novel
The Fountainhead was published, Heinlein was very favorably impressed, as quoted in "Grumbles ..." and mentioned John Galt—the hero in Rand's
Atlas Shrugged—as a heroic archetype in
The Moon Is a Harsh Mistress. He was also strongly affected by the religious philosopher
P. D. Ouspensky. published in 1951: {{blockquote|text=The banker reached into the folds of his gown, pulled out a single credit note. "But eat first—a full belly steadies the judgment. Do me the honor of accepting this as our welcome to the newcomer." His pride said no; his stomach said YES! Don took it and said, "Uh, thanks! That's awfully kind of you. I'll pay it back, first chance." "Instead, pay it forward to some other brother who needs it." He referred to this in a number of other stories, although sometimes just saying to pay a debt back by helping others, as in one of his last works,
Job, a Comedy of Justice. Heinlein was a mentor to
Ray Bradbury, giving him help and quite possibly passing on the concept, made famous by the publication of a letter from him to Heinlein thanking him. In Bradbury's novel
Dandelion Wine, published in 1957, when the main character Douglas Spaulding is reflecting on his life being saved by Mr. Jonas, the Junkman: Bradbury has also advised that writers he has helped thank him by helping other writers. Heinlein both preached and practiced this philosophy; now the
Heinlein Society, a humanitarian organization founded in his name, does so, attributing the philosophy to its various efforts, including Heinlein for Heroes, the Heinlein Society Scholarship Program, and Heinlein Society blood drives. Author Spider Robinson made repeated reference to the doctrine, attributing it to his spiritual mentor Heinlein. ==Influence and legacy==