And apparently we need to lie about history to make it more inclusive.
http://www.bbc.com/news/entertainment-arts-36442982
I'll summarise: The lead writer of Doctor Who, Steven Moffat, says that it is important to lie about history to make it more inclusive. He's talking more about TV shows like Doctor Who rather than history books. For example, putting black people in medieval Scandinavia or making multi-cultural societies where none would have existed in the name of inclusion because making history friendly is more important than accuracy or authenticity.
He also wants Doctor Who to have two black lead characters because that would make it better somehow.
I really don't understand this like of thinking, that changing a character's race somehow improves the work. If James Bond was black, how would that improve the story? He would still be the same character with the same job fighting the same bad guys. It makes no sense.
A black Doctor would still be a Time Lord with a TARDIS. How does changing his race do anything but break continuity?