What problems did germany face at the end of the 20th century?

Top among the problems that Germany faced was economic stagnation. Germany experienced a stagnant economy by the 1980s. Reunification of East and West Germany exacerbated the problem because East Germany's formerly communist economy was very depressed and in need of reform.

1. it was caused by feudalism

2. charlemagne used christianity as a major cornerstone for his rule. cloisters were built all over the empire to act as centers for the (re)population of the vast european wilderness.

3. the europeans feared the next raid every time chetak

i'm not so sure about #6. but i hope i you with the first 3.