What did Vyvyen Brendon think the main cause of World War 1 was?

Vyvyen Brendon believed that the main cause of World War I was a complex interplay of nationalism, militarism, and Imperialism, which had created a volatile political landscape in Europe. He emphasized that these factors, combined with a web of alliances and a series of crises, ultimately led to the outbreak of the war in 1914. Brendon also pointed to the failures of diplomacy and the miscalculations of leaders as critical elements that escalated tensions into a full-scale conflict.