For any argument I think this is the key concept.
This relates to Germany's policies in Europe and the rest of the world - they wanted an empire like the British and French. But why would an encircled nation fight a land war in Europe against the strongest powers of the age -Facing the prospect of a war on two fronts.
You only have to look at a map to see this:
At the same time their position has some advantages -They would have short interior lines that would facilitate the rapid movement of forces from one front to another, which gives the possibility of defeating opponents sequentially and in detail. Schlieffen’s 1905 Plan – Krieg gegen Frankreich – focuses on defeating France first. I'm not saying this is indicative of an intended war as undoubtedly most powers had some plan of how they would fight war, especially given the onset of new technology.
It is really hard to say if Germany is indeed responsible. We have the advantage of looking back and saying 'they were never going to win'.
Even the Germans knew that a war would be damning. Helmuth von Motlke covered it pretty well -
"Gentlemen, if the war which has hung over our heads for more than ten years like a sword of Damocles - if this war were to break out, no one could foresee how long it would last nor how it would end. The greatest powers in Europe, armed as never before, would confront each other in battle. None of them could be thrown down so completely, in one or two campaigns, that they would have to admit defeat and be compelled to accept hard conditions for peace without any chance, even after a year's time, of renewing the fight. Gentlemen, it could be a Seven Years' War; it could be a Thirty Years' War; and woe to the man who sets Europe ablaze, who first throws the match into the powder barrel!"
Judging from that quote all parties are guilty, just Germany perhaps moreso
People place too much blame on the Germans. Anyone of the Imperial powers could have started this war, and many argue Germany's act of war is of self defense.