Answer:
Racism leads to the belief that one race is better or of "higher-standard" than another. The race that is "master" would then, obviously, be able to subject other races, including making them slaves (people who work for them without pay). Because of racism, they believe that lower-class races would need to be obligated to serve higher-class races, or Aryans.
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Wilbert Awdry Christopher Awdry and Britt Allcroft
It peaked in Europe between 1348 and 1350 and is thought to have been a bubonic plague outbreak caused by Yersinia pestis, a bacterium. It reached the Crimea in 1346 and most likely spread via fleas on black rats that travelled on merchant ships. It soon spread through the Mediterranean and Europe
