In some instances, encouraging multicuturalism is an appropiate measurement to adopt in some nations, in some others it is not.
Multiculturalism is expected to help develop national bonds as well as common goals.
However, multiculturalism is usually about inmigrants who strive to impose their ways upon their new neighbors. Division is created when any specific group refuses to integrate by not speaking the commonly accepted language or becoming part of the general culture, for example when inmigrants not only refuse to accept the same religion and holidays but they demand their own to be recognized.
Such is the situation in modern Egypt, where multiculturalism has brought conflict between Copts (Christian) and Muslim Egyptians.
Conflicts between these two factions have even escalated to violence in the last 30 years due to these reasons.
Answer:
"The doctrine of sola fide asserts God's pardon for guilty sinners is granted to and received through faith alone, excluding all "works" (good deeds). ... According to Martin Luther, justification by faith alone is the article on which the Church stands or falls."
Source: Wikipedia
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They learned to have a better navy, because they hired Greek captains to help them become better sailors since their sailors were pretty bad. Once they boarded the enemy then they engaged had-to-hand combat.