To What Extent Was Germany Solely Responsibly for WW1?

Causes of WW1

“Europe today is a powder keg and the leaders are like men smoking in an arsenal…A single spark will set off an explosion that will consume us all…I cannot tell you when that explosion will occur, but I can tell you where…Some damned foolish thing in the Balkans will set it off.”
Otto von Bismarck
Structural Causes / Immediate Causes / The Spark (The July Crisis)
Alliance System
Staggering Empires / Declaration of Weltpolitik
The Moroccan Crisis (1905)
The Bosnian Crisis (1908)
The 2nd Moroccan Crisis (1911)
The 1st Balkan War (1912)
The 2nd Balkan War (1913) / Assassination of Franz Ferdinand
“The Blank Cheque”
The Serbian Ultimatum
Belgian Neutrality
Russian Mobilization
Declarations of War

To what extent was the July Crisis destined simply to be only the 3rd Balkan War?

"The Allied and Associated Governments affirm and Germany accepts the responsibility of Germany and her allies for causing all the loss and damage to which the Allied and Associated Governments and their nationals have been subjected as a consequence of the war imposed upon them by the aggression of Germany and her allies.” Versailles Treaty “War Guilt Clause 231”
Responsibility of Germany: / Responsibility of Austria-Hungary: / Responsibility of Russia:
Responsibility of France: / Responsibility of Britain: / Reasons Germany was NOT responsible:

To what extent was Germany solely responsibly for WW1?