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.
The answer to the cause of the war is as large as the war itself. The best way to answer this question is with this statement. The US Civil War was the result of Southern slave states believing that their way of life, slavery, and its economics were becoming marginalized.