A monthly reading of the world's flashpoints

The Ladder

How close is the world to a war between great powers, and why? Six conflicts, placed on an eight-rung escalation ladder by a checklist anyone can inspect.

This month at a glance

Highest rung: 5 · Open warRussia–Ukraine Iran–Israel–US
Most pressure: 13/16 · SevereRussia–NATO Iran–Israel–US
Climbing: ↑Russia–NATO Iran–Israel–US Korea

Start at the bottom

Drag the globe. Every pin is a live conflict in this month's reading.

01 · The ladder

Eight rungs, from rivalry to the end

In 1965 the strategist Herman Kahn described war as a ladder that rivals climb one rung at a time. This is a simplified version. Each conflict sits on the rung it has reached; the arrow shows which way it moved this month.

Rivalry

Competition, sanctions and hard words. No shots fired.

Crisis

Mobilizations, missile tests, border incidents, ultimatums.

Gray zone

Deniable or limited attacks, proxies, sabotage, probing of airspace.

Limited strikes

Open but bounded exchanges of fire between states, then a pause.

Open war

Sustained war between states.

Great powers collide

Nuclear-armed great powers, or their treaty allies, fighting each other directly.

Nuclear use

Any nuclear detonation in war, however small.

General nuclear war

Strikes on cities and arsenals. The top of the ladder.

Six flashpoints

Where the world could catch fire

Each pin is a conflict where a great power, or a nuclear-armed state, is directly involved. Scroll to visit each one, or jump straight there.

Eastern flank & Baltic Sea

Russia and NATO

Rung 3 · Gray zone↑ Climbing this month

The lowest rung of the six, and the one that matters most. Russian drones keep crossing into NATO countries. Each crossing is small; together they test whether the alliance's mutual-defense promise still holds.

Pressure to climb13/16 · Severe

Nuclear arms
Great powers
Unlimited aims
Narrow sea
Treaty trigger
No off-ramp
Shooting now
Talks broken

Sep 2025Around twenty Russian drones enter Polish airspace in one night. NATO jets shoot some down, the first time allied fighters have downed Russian drones over NATO territory.
29 May 2026A Russian drone hits an apartment building in Galați, Romania, injuring two civilians. Romania's foreign minister says the attack justifies invoking NATO's Article 4.
16 Aug 2026Romania shoots down a suspected Russian drone in its own airspace.
31 Oct 2026Drones, likely Russian, cross into Moldovan and Romanian airspace again.
2–3 Nov 2026Poland says it prevented a Russian provocation on its border with Russia.

What pushes it up

A drone or missile that kills people inside a NATO country
Sabotage of Baltic Sea cables or pipelines
Russia freeing up forces if the war in Ukraine pauses

What pulls it down

Stronger air defenses along the eastern flank
Consultations under Article 4 rather than Article 5
A ceasefire in Ukraine that reduces strikes near NATO borders

Sources (4)

Eastern Europe

Russia and Ukraine

Rung 5 · Open war→ Holding this month

Europe's largest war since 1945 enters its fifth winter. Russia is striking Ukraine's power grid at record scale while losing ground at the front. A new round of talks is set for Abu Dhabi.

Pressure to climb10/16 · High

Nuclear arms
Great powers
Unlimited aims
Narrow sea
Treaty trigger
No off-ramp
Shooting now
Talks broken

24 Feb 2022Russia launches its full-scale invasion of Ukraine.
Oct 2026Russian forces lose ground for a second month in a row and suffer their heaviest monthly losses of the war, according to ISW.
3 Nov 2026A mass drone and missile strike hits energy sites in nine regions; a hospital in Kharkiv is struck.
3 Nov 2026A strike hits a substation that serves the Khmelnytskyi nuclear plant.
10–11 Nov 2026Trilateral US–Russia–Ukraine talks are scheduled in Abu Dhabi.

What pushes it up

Strikes near nuclear power plants
A winter campaign aimed at making cities unlivable
Western air-defense deliveries running short

What pulls it down

The Abu Dhabi talks
Local ceasefires, such as the one proposed around Kherson
Rising costs for Russia's economy and army

Sources (4)

Persian Gulf & Strait of Hormuz

Iran, Israel and the United States

Rung 5 · Open war↑ Climbing this month

The war that began on 28 February has moved from the air to the sea. Talks keep resuming and collapsing, while October brought the most attacks on ships in the Strait of Hormuz since the war began.

Pressure to climb13/16 · Severe

Nuclear arms
Great powers
Unlimited aims
Narrow sea
Treaty trigger
No off-ramp
Shooting now
Talks broken

28 Feb 2026The United States and Israel launch strikes on Iran. Iran's supreme leader is killed.
8 Apr 2026A two-week ceasefire, mediated by Pakistan, takes effect.
17 Jun 2026The presidents of the US and Iran sign a memorandum to end the war.
8 Jul 2026The deal collapses after attacks on commercial ships in the Strait of Hormuz.
Oct 2026Ship attacks in and near Hormuz reach their highest level of the war. Qatari mediators hand Iran a new proposal.

What pushes it up

More tankers hit by mines or missiles
A US decision to resume large-scale strikes
Iran concluding that only a nuclear weapon guarantees its survival

What pulls it down

Qatari mediation and a proposed plan to reopen Hormuz
Signs of US flexibility on uranium enrichment
Oil flows through Hormuz recovering toward pre-war levels

Sources (5)

Taiwan Strait

China and Taiwan

Rung 2 · Crisis→ Holding this month

No shots, but steady pressure. Beijing pairs diplomacy with drills, coast guard patrols and rehearsals of a blockade. US commanders say Beijing wants its military able to take Taiwan by 2027.

Pressure to climb9/16 · Elevated

Nuclear arms
Great powers
Unlimited aims
Narrow sea
Treaty trigger
No off-ramp
Shooting now
Talks broken

Late 2025China's "Justice Mission 2025" exercises add to the pressure around Taiwan.
Jan–Jul 2026Chinese military activity near Taiwan is relatively low by recent standards.
12 Oct 2026China announces a new wave of live-fire drills across several seas. Taiwan says it is monitoring closely.
2027The year by which, according to US commanders, Xi Jinping wants the PLA capable of seizing Taiwan.

What pushes it up

Blockade or quarantine rehearsals turning into the real thing
A collision at sea or in the air
A US–China trade or technology rupture

What pulls it down

Regular US–China leader contact
Taiwan's own defenses raising the cost of any attack
Economic ties that both sides still depend on

Sources (3)

Demilitarized Zone

The Korean Peninsula

Rung 2 · Crisis↑ Climbing this month

Tension along the border is at its highest in years. A mine blast in the DMZ, propaganda loudspeakers back on, and North Korea's seventeenth ballistic missile event of the year.

Pressure to climb10/16 · High

Nuclear arms
Great powers
Unlimited aims
Narrow sea
Treaty trigger
No off-ramp
Shooting now
Talks broken

3 Oct 2026North Korea fires what it calls an intermediate-range strategic missile, flying more than 700 km.
5 Oct 2026A joint inquiry with the UN Command finds North Korean mines placed south of the demarcation line, after a blast injured South Korean soldiers.
23 Oct 2026Seoul proposes military talks and the restoration of communication lines.
29 Oct 2026About ten short-range ballistic missiles are fired from Wonsan, the 17th launch event of 2026 by Yonhap's count.

What pushes it up

Another deadly border incident
No working military hotline
Closer military ties between North Korea and Russia

What pulls it down

Seoul's offer of military talks
A possible meeting between Donald Trump and Kim Jong Un
China's interest in a quiet border

Sources (3)

Kashmir & the border

India and Pakistan

Rung 2 · Crisis→ Holding this month

Two nuclear powers that fought for four days in May 2025 and never fully stood down. Embassies are run by deputies, a water treaty is suspended, and border shootings keep both capitals on edge.

Pressure to climb8/16 · Elevated

Nuclear arms
Great powers
Unlimited aims
Narrow sea
Treaty trigger
No off-ramp
Shooting now
Talks broken

22 Apr 2025A militant attack at Pahalgam in Kashmir kills 26 people, most of them tourists.
7–10 May 2025India strikes targets in Pakistan; four days of missile, drone and artillery exchanges end in a ceasefire.
16 Sep 2026The two governments summon each other's envoys after a naval collision in the Arabian Sea.
2 Oct 2026Indian border guards shoot three Pakistani civilians, killing two. The two sides dispute what happened.
Oct 2026The Indus Waters Treaty remains in abeyance; Pakistan raises it with the UN Secretary-General.

What pushes it up

Another mass-casualty attack in Kashmir
Water disputes under the suspended treaty
Very short decision times between two nuclear arsenals

What pulls it down

The May 2025 ceasefire still holding
Outside powers with influence in both capitals
The memory of how quickly May 2025 escalated

Sources (3)

Close-up · The Baltic

Where NATO is thinnest

If the Russia–NATO flashpoint climbs, this is where geography matters most. The eight Nordic and Baltic countries have spent the past four years building their own security ties around it.

DenmarkEstoniaFinlandIcelandLatviaLithuaniaNorwaySweden

Suwałki GapAbout 65 km of Polish–Lithuanian border between Belarus and Russia's Kaliningrad exclave. The only land link from the Baltic states to the rest of NATO.
KaliningradA heavily armed Russian exclave between Poland and Lithuania.
NarvaEstonia's third-largest city, on the Russian border.
Gulf of FinlandA narrow sea. Subsea power and data cables between Finland and Estonia were damaged in 2023 and 2024.
TallinnIn September 2025 three Russian fighter jets entered Estonian airspace for about 12 minutes. Estonia called for NATO consultations under Article 4.

02 · The checklist

Where a conflict stands, and how hard it is being pushed

The rung says what is happening now. The checklist measures the pressure to climb: eight warning signs drawn from the history of how wars widen, each scored no, partly or yes. A conflict low on the ladder can still carry the most pressure.

Rung on the ladder, against pressure from the checklist. The upper right is where wars widen.

	Nuclear arms	Great powers	Unlimited aims	Narrow sea	Treaty trigger	No off-ramp	Shooting now	Talks broken	Pressure
Russia–NATO									13Severe
Iran–Israel–US									13Severe
Russia–Ukraine									10High
Korea									10High
China–Taiwan									9Elevated
India–Pakistan									8Elevated

No Partly Yes · Click a sign to read what it asks.

An alliance tripwireCould a mutual-defense commitment pull more countries in? Scored yes this month: Russia–NATO, Korea.

03 · Field guide

Nine ideas for reading any war

The checklist rests on these concepts. Most are drawn from historian Sarah C. M. Paine, retired professor at the US Naval War College, as she laid them out in a 2026 interview on The Diary Of A CEO.

Maritime vs. continental

Maritime powers grow rich through trade under shared rules. Continental powers seek security by taking land. A war over the world order is a war between these two ideas.

Seen inPaine places Russia and China in the continental camp, and argues the US risks drifting there when it claims other countries' territory.

Limited vs. unlimited aims

A limited aim asks for something: a border, a concession. An unlimited aim seeks to end the other side's state or government. Unlimited aims make wars far harder to stop.

Seen inRussia's aims in Ukraine; regime-change goals in the war with Iran.

Death ground

An idea from Sun Tzu. A side that believes it will be destroyed whatever it does has nothing to lose by fighting on, so it becomes far more dangerous.

Seen inUkraine in 2022; Iran's leadership after February 2026.

Pivotal error

A decision after which every remaining option is worse than the ones you had before, and the old options never come back.

Seen inRussia's full-scale invasion of Ukraine, which strengthened the Ukrainian nation it set out to erase.

Narrow seas close in war

Straits are easy to shut with mines, missiles and shore guns. Whoever depends on them is exposed the moment fighting starts.

Seen inThe Strait of Hormuz in 2026; the Black Sea since 2022; the Baltic's narrow approaches.

No off-ramp

A dictator who leaves power may lose his freedom, wealth or life, so he keeps escalating. And when one dies, there is no rule for who comes next.

Seen inPaine argues democracies should keep a plan on the shelf for the day each dictator's rule ends.

Negative objectives

Much of good statecraft is preventing things: the war that never started, the bridge that never fell. Success is invisible, so it is rarely rewarded.

Seen inDeterrence in Europe after 1949. See the near misses below.

The enemy gets a vote

Wishing a war over does not end it. The other side decides too, and a power with unlimited aims will not stop because you stop.

Seen inThe argument that giving up Ukraine would end the danger to the rest of Europe.

Situation or problem

Some problems can be solved. Others can only be managed at a bearable cost over years, like the Soviet threat in the Cold War. Trying to solve a situation leads to overreach.

Seen inContaining Iran's nuclear program at a manageable cost versus trying to remove the threat by force.

04 · The days the world didn't end

Ten times the ladder was not climbed

Prevention leaves no monument. These are the moments when someone checked, waited or said no.

1962

27 Oct 1962 · Caribbean Sea

The officer who said no

During the Cuban Missile Crisis, US ships drop depth charges near the Soviet submarine B-59, which carries a nuclear torpedo. Launching it needs three officers to agree. Vasili Arkhipov refuses.

Why it stoppedOne dissenting vote.

1969

Mar–Sep 1969 · Ussuri River

The forgotten nuclear crisis

Soviet and Chinese troops clash on Zhenbao (Damansky) Island. Over the following months, Moscow quietly sounds out other governments about a strike on China's nuclear sites.

Why it stoppedTalks between the two premiers in September cooled the border.

1973

24 Oct 1973 · Washington

DEFCON 3

As the Yom Kippur War ends, Moscow signals it may send troops to Egypt. US forces go to DEFCON 3 worldwide.

Why it stoppedPressure on Israel to stop fighting, and a UN force instead of Soviet troops.

1979

9 Nov 1979 · Colorado

The training tape

A test scenario loaded into NORAD's live system shows a full Soviet attack. Interceptors are scrambled.

Why it stoppedSatellites and radars showed nothing, and officers trusted them.

1980

3 Jun 1980 · Colorado

A faulty chip

A failing computer chip makes US warning screens show incoming Soviet missiles, in changing numbers.

Why it stoppedThe numbers made no sense, and crews checked before acting.

1983

26 Sep 1983 · Near Moscow

Stanislav Petrov

Soviet satellites report five US missiles launched. The duty officer judges it a false alarm and does not pass it up the chain as an attack.

Why it stoppedA real first strike would not be five missiles.

1983

Nov 1983 · Western Europe

Able Archer 83

A realistic NATO exercise in nuclear release procedures alarms Soviet leaders, already convinced the West might strike first. Some Soviet forces are readied.

Why it stoppedNATO ended the exercise on schedule without escalating its alert.

1995

25 Jan 1995 · Norway

The weather rocket

A Norwegian research rocket looks like a US submarine-launched missile on Russian radar. Boris Yeltsin's nuclear briefcase is activated.

Why it stoppedThe rocket flew away from Russia, and the alert was stood down within minutes.

2022

15 Nov 2022 · Przewodów, Poland

A missile in a NATO village

A missile kills two farm workers in Poland near the Ukrainian border. For hours, the world asks if Article 5 applies.

Why it stoppedInvestigators quickly traced it to Ukrainian air defense, and leaders waited for the facts.

2025

10 May 2025 · India & Pakistan

Four days, two arsenals

Two nuclear-armed neighbors trade missile, drone and artillery strikes for four days.

Why it stoppedA ceasefire on the fourth day, before either side reached for more.

05 · Method

A reading, not a prediction

How each conflict is placed

Once a month I read the record for each flashpoint, mainly the Institute for the Study of War, the Council on Foreign Relations' conflict tracker, wire services and regional press. I place each conflict on the rung it has actually reached, then score the eight warning signs. Every score is a judgment, and every flashpoint lists its sources.

The pressure score is the sum of the eight signs, from 0 to 16. Up to 5 is low, 6 to 9 elevated, 10 to 12 high, and 13 or more severe. It is not a probability, and no one can honestly turn it into one.

What it leaves out

Civil wars and humanitarian catastrophes, from Sudan to Myanmar, kill more people than several conflicts here. They are left out only because this project asks a narrower question: where could a war between great powers begin?

The Ladder takes no side. It describes what governments and armies have done, as reported by named sources. If you think a score is wrong, write to info@valevlaube.com and the next reading will consider it.

Credits

Escalation ladder adapted from Herman Kahn, On Escalation (1965). Field guide concepts largely from Sarah C. M. Paine. The near misses are documented history. Night Earth imagery: NASA Earth Observatory. Built by Valev Laube in New York and Tallinn.

This reading: 4 November 2026. Next reading: early December 2026.