Do you really think that WW1 was the result of the German franchise system?
It's not as unreasonable a claim as it seems; obviously, what DValdron isn't saying is that Gavrilo Princip shot the Archduke because of Germany's electoral system. But it is fact that the path Germany took which led very clearly did have at least quite strong roots in a conservative, militarist tendency in German politics which brought it on a collision course with its neighbors, and threw it straight into a deeply damaging war that caused the collapse of the entire pre-war system. Leaving aside that the fact that the Prussian Landtag covered over half the territory of the German Empire, the unequal electoral system in Prussia can be very easily argued to be symptomatic of these serious fundamental issues which plagued the German Empire, which traced themselves in no small part towards the overwhelming influence of this Prussian, conservative, and militarist tendency, which sought to keeppower concentrated in traditional (typically military and landed) elites, and imposed a similar system on much of the rest of Germany by virtue of Prussia's overwhelming role in the German Empire. So it's not that WWI followed directly from the unequal Prussian franchise, but rather that the pervasive influence of this regressive Prussian political culture naturally resulted in both the lingering unequal franchise in Prussia where it had long been abandoned elsewhere, both inside and outside the empire, as well as contributing to the perseverence of a toxic militarist culture that ultimately would destroy the German Empire.
Mind, this is a very general and loose analysis, and there are large places where it does fall apart. Even though the Prussian Landtag did have a disproportionate influence on the German Empire by virtue of covering 3/5 of Germany, ultimately, it was the Prussian Landtag, not the German Reichstag, which
was governed by one man, one vote by 1914. And in the Reichstag, the Social Democrats, in spite of an electoral system that was built to be rigged against them (and who moreover had been illegal not thirty years ago), were rapidly becoming the single strongest political party in Germany, and its probable that had a decade further passed without war, their influence would have grown so great that they could easily have overturned the old German conservative ascendancy. Or perhaps not, since it was again, not actually that difficult to rig the German system to keep out 'the wrong sort' and in any case, it has been argued (by reputable historians too) that the German conservative establishment played a significant and outsize role in fomenting WWI precisely in order to avert this possibility (the hope was that a decisive military victory would help swing the Empire back in a conservative direction, blunting the SDP's rise). So certainly, WWI or a similar catastrophe is absolutely not an *inevitable* result for the German Empire if it is Prussian created, but the system which created the unequal franchise in Prussia which were then exported to the creation of the German Empire made such an upheaval, collision course, or outright catastrophe far more likely than it would have been otherwise.
So, as I said, very existence of these factors, I would think, is symptomatic of the toxic, anti-populist, political culture within Prussia which she then imposed on the rest of Germany, and in this sense, because the unequal franchise is part and parcel part of that toxic culture, one can, in fact, trace WWI back towards little things like the Prussians being especially regressive with regards to their electoral system and Germany having the misfortune to have been a Prussian creation.