The Role of Third Parties in Instigating a War Between Thucydity and Rivals

Neither Great Britain nor Germany wanted war, but they got themselves into a set of entanglements that then allowed something as otherwise inconsequential as the assassination of an archduke in Serievo to become a spark. And actually Europe, which had been the cockpit of civilization for half a millennium, was basically exhausted and never recovered. So I think the reminder that you don't have to want war for war to happen is very valuable.