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.
What the real reason behind the American Civil War? People say that the main cause is slavery, but that doesn't make sense why would the north sacrifice there resources and man power to fight slavery.