Final answer:
Germany had a greater role in starting World War I. Evidence includes Germany's support for Austria-Hungary, violation of Belgium's neutrality, and the plan to attack France.
Step-by-step explanation:
In the start of World War I, it is difficult to assign primary blame to just one country. Both Austria-Hungary and Germany played significant roles in the outbreak of war. However, three pieces of evidence suggest that Germany had a greater role in starting the war.
First, Germany offered Austria-Hungary unconditional support, known as the 'blank check theory,' which emboldened Austria-Hungary to declare war on Serbia. Second, Germany violated Belgium's neutrality by invading it, which prompted England to enter the war.
Third, Germany had a plan to attack France that involved invading Belgium. These actions ultimately led to the involvement of more countries and the escalation of the conflict.