Answer:
They did not have as much power as Charlemagne
They haven't been vaccinated against diseases that are common in Europe or their bodies aren't adapted to European lifestyles
Measures taken by groups such as the United Nations to try to prevent genocide following World War II included making the crime of genocide punishable under international law. The United Nations approved its Convention on the Prevention and Punishment of the Crime of Genocide (CPPCG) in 1948 which was later on ratified by more than 130 countries. However, this did not prevent future genocides such as in Yugoslavia and Rwanda
