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
Causing the Civil War. Historically, textbooks have taught that incompatibility between northern and southern economies caused the Civil War. The industrial revolution in the North, during the first few decades of the 19th century, brought about a machine age economy that relied on wage laborers, not slaves.
The civil war occurred because after November 1917, many groups had formed that opposed Leninâs Bolsheviks. These groups included monarchists, militarists, and, for a short time, foreign nations. Collectively, they were known as the Whites while the Bolsheviks were known as the Reds.