Rolling Stone helps to create social and cultural ideas about groups of people in at least two ways.
First, as a music magazine, it helps to create certain ideas in our minds about musicians and those around the music world. It helps create an image, for example, that they are given to using drugs and to other lifestyle choices that would seem destructive to many Americans.
Second, it helps to create an image of corporate America as a bunch of plutocrats who are bent on exploiting the common people for their own good. It tends to portray politicians as weak and possibly corrupt people who facilitate this exploitation. As can be seen here, the magazine says things like
... the Obama administration has looked the other way as the bank [Bank of America] committed an astonishing variety of crimes – some elaborate and brilliant in their conception, some so crude that they'd be beneath your average street thug.
By saying things like this, the magazine helps to create a cultural image that corporate America is a harmful influence on the country and that the government is too weak to stand up to it.