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: Abolitionism. The issue of slavery was further heightened by the rise of the Abolitionist movement in the 1820s and 1830s. Beginning in the North, adherents believed that slavery was morally wrong rather than simply a social evil.
An easy to remember list of the most important issues surrounding the causes of the war is: Militarism-many countries believed it was important to build large armies and navies. Alliances-the Triple Alliance and the Triple Entente were said to have been formed to help prevent war.