Is there danger in giving governments the power to create fiat money?

yes and no. For the most part yes as it allows the government to pick and choose what is and isn't recognized as a local currency. A good example of fiat money is gold.

c.) the country needed a stronger central government.

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.