Most people of Western Europe, for most of the Middle Ages, were linked by a belief in Christianity, in the communion of the Catholic Church.
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Vikings
Steam power
During the early middle ages, 500 - 1000AD, Europe was a frontier land as it was sparsely populated and undeveloped. ;P
hell yeah
Roman Catholic
The fall of the Roman empire
enjoyed greater prosperity
Of course the Vikings
Latin was used as a common language all over Western Europe. Greek was used similarly, to a degree, in the East.
Neanderthals primarily settled in Europe and parts of western Asia during the Middle Paleolithic period. They inhabited a range of environments, from open grasslands to dense forests, and adapted their lifestyles to survive in these varied landscapes.
the united kingdom and states of great britain