The document discusses several causes of international conflicts between nations:
1) Competing claims over territory can lead countries to war, as seen in the Sino-Indian war over disputed border regions.
2) Scarce resources can also cause conflicts, like the "Cod War" between Iceland and Britain over fishing rights.
3) Ideological differences divided Korea after World War 2, leading to the Korean War as North and South Korea, backed by communist and democratic allies respectively, fought to control the Korean peninsula.