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First and Second World War

Question: When did people start saying: We are in a world war? Explain it to me for 1914-1918 and also for 1939-1945.

Based on historical records and contemporary sources, here's when the term "world war" emerged during each conflict:

1914-1918 (The First Global Conflict)

During the war itself:

The term "World War" was actually coined during the conflict, not retrospectively

German biologist Ernst Haeckel used "first world war" as early as September 1914

Contemporary newspapers and commentators sometimes used "World War" interchangeably with "Great War" before fighting ended in 1918

However, "The Great War" remained the dominant label throughout the conflict and immediately after

Post-war evolution:

In the 1920s, historians began regularly referring to the 1914-1918 conflict as "The World War"

The first public use of "First World War" appears in memoirs published in 1920

"The Great War" continued to be the common term throughout the 1920s and 1930s

1939-1945 (The Second Global Conflict)

The transition point:

Until September 1939, the 1914-18 war was still primarily called "The Great War"

When war was declared in September 1939, the realization came that most countries of the world were involved again

The term "First World War" came into use on or close to September 3, 1939

Time Magazine used "World War 1" in June 1939 (before the war officially started in Europe)

The new conflict logically became "World War II"

Popular adoption:

Use of "First World War" and "World War 1" overtook "The Great War" in general use around 1941

By the end of WWII, the numbering system (WWI/WWII) had become firmly established

The key insight is that people didn't initially call it a "world war" because they didn't know there would be a second one—the numbering only made sense once the second conflict began.

What would be needed to say we are in world war iii? what's the criteria?

Based on historical precedent and expert analysis, there's no formal international body that declares world wars—the designation is typically applied retrospectively by historians, media, and governments. However, scholars and analysts have identified several criteria that would need to be met:

Core Criteria for "World War III"

1. Multiple Great Powers on Opposing Sides

At least two opposing coalitions, each containing multiple major powers

Not just regional conflicts, but engagement of the world's leading military and industrial nations (US, China, Russia, EU powers, etc.)

2. Geographic Scope Across Continents

Fighting must extend across several continents simultaneously

Must encompass a large portion of the world's territory, not isolated regional theaters

3. Broad Major Power Participation

Majority of the world's major powers must be engaged, either directly or through binding alliances

Significant portions of global population drawn into the conflict

4. Global Systemic Impact

Must threaten global political, economic, and security structures

Far exceeds the scale of regional or limited-scope conflicts

Would fundamentally reshape international order

Important Context

Retrospective Designation: Both WWI and WWII weren't called "world wars" until after subsequent conflicts made the numbering logical. WWI was originally "The Great War" until WWII occurred.

Current Conflicts: While there are multiple active conflicts globally (Ukraine-Russia, Middle East tensions, etc.), analysts note these don't currently meet the criteria because:

They remain largely regional despite global involvement

Major powers haven't entered direct combat with each other

No clear opposing global coalitions have formed

Nuclear Dimension: Many analysts argue that WWIII would likely involve nuclear weapons given current arsenals, which would fundamentally distinguish it from previous world wars in terms of destruction and stakes.

The designation ultimately depends on historical consensus rather than any official declaration—it's about whether future historians view a conflict as having truly engaged the world's major powers across multiple continents in a way that reshaped global civilization.

Source: LUMO.

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