Decades ago, when I studied European history in high school, I learned there were precise causes of World War I: the alliance system, arms build-up, secret treaties, nationalism, and imperialism
More recently, historians have started to lay out a more complex road to World War I: namely, a road that passed through social and cultural change at the turn of the century
People's lives were affected by changing family structures, by paradigm shifts in science, disruption of traditional gender roles, achievement of the vote by working men, and ongoing economic advances, and the result was disorientation, dislocation, deep resentments, and widespread fear
Passions exploded over the case, and anti-Semitism flourished, families quarreled, and assaults took place around questions of whether Dreyfus had committed these crimes
Bismarck wanted peace in Europe and so organized an alliance system to that end, binding Germany and Austria in the Dual Alliance of 1879, then adding Italy to a Triple Alliance in 1882
Bismarck also allied Germany with Russia in the Reinsurance Treaty, another attempt to build coalitions so formidable that large wars would become impossible
When William II, aka Kaiser Wilhelm, came to power in Germany in 1890, he rattled the sword, and called Bismarck's alliances the work of an outmoded old man
William II also wanted Dreadnoughts, because he hoped to win the British over to an alliance of Teutonic peoples, including especially Germans, that could defeat the "Latins" or "Gauls" of southern Europe whom he considered inferior
He had tantrums and even months of nervous collapse when he was criticized in the press and elsewhere, creating an atmosphere of turmoil in German policy through erratic militarism
Ordinary people paid the price for these losses and rebelled, but then Tsarist promises of reform, combined with armed force, eventually restored calm and preserved the Romanov grip on power--for another decade or so