Invasions of people--many of the groups came as military and fought the Romans as invading forces.
Counterclaim--they were migration patterns as they were attempting to gain access to an empire with advanced trade and education. Migrating to the Roman Empire gave a person or group with extra resources.
Hitler's regime was socially far-right but fairly left economically. But regardless, it was very much so a right-wing authoritarian, single-party dictatorship.
After the fall of the Western Roman Empire, the spread of Christianity<span> in </span>Europe<span> began. It was aided by </span>Christian<span> groups and institutions that promoted </span>Christian<span> beliefs. Among the most important with a monasteries, or places where people could dedicate their lives to prayer and meditation.</span>