A muckraker is a journalist who searches and writes for the sole purpose of exposing a real corruption in a business, corporation or a politician or government scandal.
Islam spread so quickly because of Migration, Conquest, and The Political Order. Migration- a number or body of persons migrating together. Migration was one of the first reasons why Islam spread so quickly. When Muhammad was spreading the teachings that were given to him by the angel Gabriel, people started to resist.
Northern Union morale was low, and so it was important to raise the people's morale to have them continue to support the US in trying to defeat the South
hope this helps
A tremendous drive of the Great Migration was the massive labor shortage created by men enlisting to serve in World War I. African Americans resettled in the North and West to find higher quality and higher paying jobs for a better life.