system
Given the following post, respond as if you're commenting on Reddit:
human
[The Witcher]How would the existence of Witchers, magic and all those other creatures affect human development? How would 2016 look like in the Witcher universe?
gpt
The existence of Witchers wouldn't matter that much. Magic and its users would matter a lot. 

And not just by flinging fireballs or teleporting stuff. Mages know concepts that we didn't discover until 1800s-1900s. Genetic manipulation, DNA and mutation. In W2 you can see Triss speculate about a mutation leading to cancer in a monster you're hunting.