Racism
Racism was the idea that all members of a race were superior or inferior to another race. An individual with this belief was known as a racist. Some words used to humiliate other races were also known as racism.
The Daleks' belief in their innate superiority and need to maintain their racial purity led to inevitable conflict between the Imperial Daleks and the Renegade Daleks. As Ace succinctly put it, "They hate each others chromosomes. War to the death." (TV: Remembrance of the Daleks)
A sign hanging in the window of Mrs Smith's boarding-house read "NO COLOUREDS", which Ace seemed to be disturbed by. (TV: Remembrance of the Daleks)</ref>
The house of Ace's friend Manisha Purkayastha was firebombed by racists in 1983. (TV: Ghost Light)
Jeff Shrubb was accused of stirring up racism, sexism and homophobia on Olleril. (PROSE: Tragedy Day)
Roz Forrester found it difficult to understand the racism and sexism she experienced in 1919 Paris, since such attitudes did not exist between humans in the 30th century from were she came. (PROSE: Toy Soldiers)
While Martha Jones was working as a maid at the Farringham School for Boys in 1913, Hutchinson made several racist remarks to her. (TV: Human Nature/ The Family of Blood)
Freda's house was burnt down by racists in 2069 because of her alien mother. She was saved by a member of Torchwood, who sent her back in time to 2009 via the Rift. (AUDIO: Asylum)
When Wilfred Mott remarked he was saved by the cactuses, the Tenth Doctor replied with "That's Cacti", to which the Vinvocci exclaimed that it was racism. (TV: The End of Time)
According to the Fifth Doctor, the Pakhars found the term "rodent people" extremely offensive, even racist. (AUDIO: Nekromanteia)