Blog

Blogs, essays, updates, and occasional notes that sit alongside The Butterfly Effect.

View over Tel Megiddo in northern Israel, site of the Battle of Megiddo in the 15th century BC.

The First Battle

Apr 16, 2026 By Andy Barca

On 16 April 1457 BC, Pharaoh Thutmose III won a battle at Megiddo that his scribe recorded in enough detail to reconstruct. Every military history before it is archaeology. This is where the written record begins.

Title page of Samuel Johnson's 1755 A Dictionary of the English Language.

The Harmless Drudge

Apr 15, 2026 By Andy Barca

On 15 April 1755, Samuel Johnson published his Dictionary of the English Language — 42,000 words, nine years of work, and one of the more entertaining acts of self-description in literary history.

Statue of Doubravka of Bohemia, Mieszko I's Christian wife, whose marriage preceded his baptism in 966.

The Marriage and the State

Apr 14, 2026 By Andy Barca

On 14 April 966, Mieszko I, pagan ruler of the Polans, converted to Christianity following his marriage to Doubravka of Bohemia. The baptism created Poland. What followed would be centuries of glory, tragedy, erasure, and resurrection.

Queue outside a bank in Kolkata during the 2016 withdrawal of India's Rs 500 and Rs 1,000 notes.

The Rupee Plot

Apr 14, 2026 By Andy Barca

Two works of Indian fiction, separated by nearly two decades, share the same subplot: Pakistani intelligence counterfeiting Indian banknotes. The coincidence is worth examining - not for what it says about Pakistan, but for what it might say about India.

Royal coat of arms of the United Kingdom (1816–1837), the arms in use when the 1829 Relief Act received royal assent.

The Price of Emancipation

Apr 13, 2026 By Andy Barca

On 13th April 1829, the Roman Catholic Relief Act received royal assent, allowing Catholics to sit in Parliament for the first time since the Penal Laws. It was a genuine victory. The terms on which it was extracted deserve closer inspection.

Nineteenth-century painting of Crusaders conquering Constantinople in 1204 during the Fourth Crusade.

The Wrong City

Apr 12, 2026 By Andy Barca

On 12 April 1204, Crusaders breached the walls of Constantinople. They had set out to free Jerusalem. They ended up sacking the greatest Christian city in the world - and dismantling the one barrier standing between Europe and the Ottoman advance.

Painting of William of Orange and his Dutch army landing at Brixham, Devon, November 1688.

A Crown by Invitation

Apr 11, 2026 By Andy Barca

On 11 April 1689, William III and Mary II were crowned as joint sovereigns of Britain. The Glorious Revolution that put them there is one of history's rarest things: a constitutional order that reformed itself without first destroying itself.

Diagram of the scale of the 10 April 1815 eruption column of Mount Tambora, Sumbawa.

The Mountain That Ate Summer

Apr 10, 2026 By Andy Barca

On 10 April 1815, Mount Tambora erupted with enough force to be heard in Sumatra. 71,000 people died. The following year, summer failed across three continents. It was the geological equivalent of a warning shot - and we have largely ignored it.

Vicente Mostre's painting of the Morisco expulsion at the port of Denia, following Philip III's 1609 decree.

The Last Muslims of Spain

Apr 9, 2026 By Andy Barca

On 9 April 1609, Philip III signed the decree expelling the Moriscos from Spain - the descendants of Muslims whose families had lived on the Iberian peninsula since 711. The Treaty of Granada had promised them peace. It took 117 years to break that promise.

Punch cartoon 'Entente Cordiale' (1904) showing Britain and France dancing together after the agreement.

A Thousand Years of Bad Blood

Apr 8, 2026 By Andy Barca

On 8 April 1904, Britain and France signed the Entente Cordiale, ending nearly a millennium of rivalry with a series of colonial bargains. The agreement did not just settle old disputes — it eventually helped ignite a world war.