Ever wondered what might have happened if the Roman Empire had never fallen? If dinosaurs were discovered in the Middle Ages? What if a single event – a lost battle, a chance happening – had reshaped the course of civilisation? These are the questions that make up alternate history fiction, a genre that reimagines the past to explore what could have been. Through the lens of a single “What if?” moment, writers can spin whole worlds that feel both familiar and slightly off. It’s part imagination, part research, and entirely addictive. If you’ve ever found these scenarios compelling, this guide will show you how to write an alternate history novel that feels rich, plausible, and emotionally resonant. Whether you’re an aspiring author looking to dive into speculative storytelling or a history buff with creative flair, this is your roadmap to rewriting the past in the most jaw-dropping ways.
In the sections ahead, we’ll dive into finding your divergence, building believable worlds, and creating characters who feel the weight of history’s altered course. As you go, you’ll discover alternate history ideas that can fuel your imagination – and perhaps even rewrite how you think about storytelling itself.
What Is Alternate History?
First things first, what do we mean by the term alternate history? An alternate history novel is a type of fictional narrative where a writer changes one key element or elements from established history and crafts a story that stems from this turning point.
The genre (which is sometimes referred to as “alternative history fiction”) is especially popular amongst contemporary readers, with many of the best alternative history stories charting on bestseller lists right across the world.
What Is The History Of Alternative History Fiction?
Alternate history skyrocketed in popularity during the twentieth century; however, literary scholars often point to 1490 and Tirant lo Blanch by Joanot Martorell as the first example of alternative history reaching the mainstream. This work imagines a world where the Turks were stopped from seizing Constantinople.
Alternate history fiction continued to drip through during the nineteenth and early twentieth century, but the genre’s heyday really exploded in the years following the Second World War. Alternate history fiction continues to thrive in the twenty-first century, especially as film and television adaptations continue to churn out from alternative history books.
Some of the famous examples of alternate history include:
- The Man in the High Castle by Philip K. Dick (1962)
- The Alteration by Kingsley Amis (1972)
- The Difference Engine by William Gibson and Bruce Sterling (1990)
- Fatherland by Robert Harris (1992)
- Making History by Stephen Fry (1997)
- 1632 by Eric Flint (2000)
- The Plot Against America by Philip Roth (2004)
- His Majesty’s Dragon by Naomi Novik (2006)
- Farthing by Jo Walton (2006)
- 11/22/63 by Stephen King (2011)
How To Write An Alternate History Novel (Step-By-Step)
Writing an alternate history story is about more than simply asking “what if?” – it’s about exploring how that sole change ripples outward through time. To build a world that feels authentic and alive, you’ll need a balance of imagination, logic, and hard research. Here’s our step-by-step approach to how to write an alternate history novel that hooks your readers from the get-go.
Check Out Our Guide On How To Research A Novel
Step 1: Choose Your Point of Divergence
Every alternate history starts with one defining moment: the point of divergence. This is the moment in history where things change – the hinge upon which your entire world swings.
Ask yourself questions like:
- What if John F Kennedy had survived his assassination attempt?
- What if Leonardo da Vinci had invented space travel?
- What if the suffragette movement led to a matriarchal society being established?
The best divergences are both plausible and provocative. They need to make readers immediately curious about the consequences. A solid rule of thumb to stick by: your divergence should create new social, political, or personal tensions – something that gives your story real stakes beyond the novelty of seeing a new kind of history.
Step 2: Research Real History Deeply
You may be rewriting history, but your world still needs to feel grounded in truth. That means diving into real historical research before you go bending the facts.
- Read first-hand accounts, letters, and diaries from the era you’re writing.
- Watch documentaries and interviews (if possible) to capture details of speech, dress, and everyday life.
- Visit archives, online libraries, or museum databases to get a feel for the real timeline.
Your goal isn’t to necessarily remember all the facts – it’s to understand the logic of the time. The more natural your groundwork, the more believable your altered reality will be.
Best Resources for Alternate History Research:
- Project Gutenberg (free access to historical texts)
- BBC History Extra and Smithsonian Magazine
- Google Scholar for academic articles
- Historical atlases for visualising changed borders and geography
Step 3: Build a Plausible New World
This is where alternate history worldbuilding truly begins. Once you’ve changed one event, everything else must adjust to fit that new reality.
Think about:
- Geography: How have borders, cities, or trade routes changed?
- Culture: How do people dress, speak, and think in this world?
- Technology: Did innovation speed up or stall after your divergence?
- Politics: Who holds power now – and who has lost it?
One of the best tricks we’ve found is to build a “worldbuilding checklist” to stay consistent:
| Worldbuilding Question | Example |
| What is the key change in history? | The Allies lose WWII |
| How does it affect daily life? | Media is censored, fears shape speech |
| What’s the new global power dynamic? | Authoritarian governments dominate |
| What cultural values define society now? | Obedience, propaganda, survival |
Consistency is the secret weapon behind good worldbuilding. Even the most imaginative of premises fall apart if the rules of your world keep changing.
Step 4: Create Characters Who Reflect the Change
The strongest alternate histories are personal. Don’t just change the world – show how that world changes people.
Your characters need to embody the consequences of your divergence. For example, a journalist in a world where the Allies lost the Second World War may struggle with censorship, loyalty, or moral compromise. Their decisions should reveal what’s gained and what’s lost when history takes a different, darker course.
Ask yourself:
- How would my character’s life differ if the past had gone another way?
- What beliefs or values would they challenge?
- What everyday struggles would they face in this altered world?
When your characters react naturally to the historical shifts, your story feels real – no matter how imaginative the world around them is.
Step 5: Develop a Conflict Grounded in the Divergence
Every compelling story needs conflict – but in alternate history fiction, that conflict needs to grow directly out of the altered timeline.
Perhaps your protagonist fights against a regime that shouldn’t exist. Maybe they discover the truth about how history really unfolded. Alternatively, they’re torn between two versions of reality.
Think of your divergence not just as a backdrop, but as the story’s heartbeat. The tension between “what was” and “what is” drives both plot and emotion.
Step 6: Link it Back to Real-World Themes
Even though alternate history reimagines the past, it always speaks to the present. The best stories explore timeless questions about power, identity, truth, and morality.
Ask yourself:
- What does my regimained world reveal about human nature?
- How does it comment on real historical patterns or modern concerns?
- Why does this “what-if” matter now?
By tying your speculative world to relatable emotions and ideas, you give readers a reason to care – and ensure your story resonates long after the final page.
Writing alternate history fiction is as much an act of imagination as it is of empathy. You’re not only rewriting events – you’re reinterpreting humanity’s choices, regrets, and possibilities. That’s what makes learning how to write an alternate history novel such a thrilling, creative challenge.
Alternate History Vs. Speculative Fiction: What’s The Difference?
Alternate history is part of the broader genre that is speculative fiction, which includes science fiction. However, alternate history has defining characteristics that help it stand out from sci-fi and other speculative subgenres.
Whilst science fiction often concerns itself with futuristic developments, alternative fiction is grounded in historical events. This point of divergence from actual history creates alternate timelines that affect all subsequent events. Therefore, alternate history books can be set in the future, but said future is altered more by the changes in established history than anything else.
Wrap Up
At its core, alternate history fiction isn’t just about changing events – it’s about exploring why we readers are so fascinated by the idea of change. Every “what-if” scenario holds a mirror to the choices humanity has made, and the choices we could make still. By twisting history’s path, we often see our own world in the present more clearly.
Learning how to write an alternate history novel is ultimately about empathy and imagination. It invites you to step into the shoes of people who could have lived different lives – to ask how culture, technology, or morality might morph in new circumstances. When it’s done well, it transforms speculation into reflection.
So, don’t wait for the perfect premise. Begin small. Choose a single turning point that ignites your curiosity – a lost battle, a different ruler, a forgotten invasion – and follow its consequences wherever they lead you. Construct a world, draft your characters, and see what history becomes in your hands.
Because in the end, writing alternate history isn’t just about rewriting the past.
It’s about reimagining the present – and asking the most human question of all: what if things had gone another way?
James has been passionate about storytelling ever since he could hold a pen. Inspired by the epic fantasy and historical dramas he devoured in his youth, his work now centers on dark, psychological tales featuring intense, introspective characters and atmospheric, gothic undertones. In 2025, he founded What We Writing to share his creative journey and the lessons he’s learned along the way with fellow writers and passionate storytellers.
