Racism
Racism can affect many parts of society, like laws, cultures, and economies. In extreme cases, it can lead to terrible events like the Holocaust, where certain races were targeted and treated horribly.  During the Holocaust, Nazis in Germany believed that some races did not even deserve to exist. These beliefs were racist. Because of those beliefs, they killed many people who belonged to those races. Those actions, which resulted from their racist beliefs, were also racist.