This document discusses the long term causes of World War 1. It begins by defining key terms like arms, treaty, alliance, empire, nationalism, and imperialism. It then lists the four main categories of long term causes as militarism, alliances, imperialism, and nationalism. The document guides students through an activity where they put the long term cause cards in chronological order and discuss related causes. They then rank the causes from most to least important. Finally, students are asked to consider whether making so many alliances was a good decision for European powers and to identify the single most important long term cause of WWI.