Original sentence: He came from an upper-class background
Edited sentence: For example, it is widely believed that one major reason why the Social democrats lost power in 1976 after having governed the country for 44 years, was Palme's attacks on main opponent Thorbjörn Fälldin, leader of the Center Party.He came from an upper-class background: his grandomother belonged to a Finnish noble family and his mother to a Latvian-Germannoble family.He was also thought to be condescending and unusally, for Swedish politics, aggressive in debates.One thing that is certain, though, is that the hatred against Palme was fierce among a lot of people.Some right-wing people thought that he had "betrayed his class" by leading the social-democrats