Racism can be defined as hatred or belief of superiority toward another person due to factors like skin color, language, customs or place of birth. It has influenced wars, slavery, and legal systems throughout history. The document identifies several causes of racism, including stereotypes promoted through media, unfamiliarity with other races, selfishness, and environmental factors that can impact biology and mental health. Overcoming racism requires enhancing health, celebrating diversity, and promoting understanding between all people.