Vernon Dursley

People born into non-magical families with no magical powers were known as Muggles. The wizarding world went to great lengths to ensure that Muggles remained unaware of their community, creating wizarding laws such as the Statute of Secrecy. Some Muggles (such as the UK Prime Minister) were aware of the wizarding community for the good of their job, while Muggles could sometimes produce Muggle-born witches and wizards - children with magical talents. Some prejudiced witches and wizards wanted to change the laws to diminish Muggles status in the world, such as Lord Voldemort and Gellert Grindelwald, and Hogwarts house founder Salazar Slytherin didn't believe in accepting any students who did not possess pure blood.