Idea
Separate ignition from the conditions for fire
A spark helps explain why a fire began at a particular moment. It does not explain why the material was combustible or why the fire spread. Likewise, a political shock may start a crisis without accounting for every decision that expands it.
Historical accounts of the First World War distinguish the Sarajevo assassination from the alliances, strategic fears, and decisions of the July Crisis. Naming the trigger answers one question. Explaining escalation asks why leaders responded as they did and why efforts to contain the conflict failed.
Identifying what started a crisis does not explain why it spread.
Where it breaks down
Adding a long list of factors is not an explanation either. Their roles and interactions need evidence. Avoiding monocausality does not mean assigning equal responsibility to everyone or claiming that individual decisions were powerless.
How it connects
The trigger-condition distinction gives different causes specific work to do.
This idea appeared in The trigger is not the whole explanation, the Involves connection for October 23, 2026, which asked: Why does one event produce a crisis here but not everywhere?
Check yourself
What improves a multi-cause explanation?
Showing how the factors contributed and interacted. Exactly. A list needs a mechanism and evidence about relative roles.
What the sources establish
The assassination and the subsequent July Crisis play distinct explanatory roles.
Sources
The Outbreak of the First World War (Imperial War Museums), Assassination, July Crisis, alliances and decisions
Why Did World War I Happen? (Council on Foreign Relations Education), Long-term factors and immediate escalation