This man opposed the passage of both the McCarran Internal Security Act of 1950 and the McCarran- Walter Immigration and Nationality Act of 1952, but Congress overrode his decisions

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.

i don't really understand the question

it took then around 17,500 years