Did the Beatles change the world?

Their fame and popularity, and ability to sell records and concerts, makes the business people take notice. From there the music industry was born. Businessman starts to invest in music. The pumping in of money, enables better recording facilities and music production techniques to be possible. Music wise.. The adventurous production techniques that they use for their albums. Arrangement of songs, have pretty much have its lasting influence in the music we hear today.

I think they changed the worlds of a huge bunch of people, and that's as good a place to start as any other place.

Music changes the world, but singers are human, so they have their good and bad sides on public view. They were people from the 60s generation, it would be impossible for them to do some of the crazy things they did then now, just because some of it is no longer accepted or have crossed over into being normal behaviour. They influenced and influence musicians and listeners then and now, their songs are adapted to be heard by newer generations and are still beautifully done. An example of their music still touching people was Blackbird which had a cover by Chris Colfer as Kurt Hummel and the Warblers on Glee. So did they influence the world? Definitely. Was it good or bad? Both, but their music is their legacy to the world and they should be judged on that.