riddle - separate with a riddle, as grain from chaff screen sift, sieve, strain - separate by passing through a sieve or other straining device to separate out coarser elements; sift the flour
Causes of the Civil War: Slavery and Control of the Government. Throughout the first half of the 19th century, Southern politicians sought to defend slavery by retaining control of the federal government.
Four underlying causes of war. The assassination of Archduke Franz Ferdinand signalled the rapid slide into world war, but this wasn't the only cause. There were underlying causes in the run-up to the First World War. In the 1930s, historians argued that there were four underlying long-term causes of the First World War: 1  Nationalism-the belief that your country is better than others. 2  This made nations assertive and aggressive.