How have the media changed over time, and how has this affected political communication?

In the 50's the TV media had shows like "Leave it Beaver" and the "Nelsons" which had a core family of four. When overpopulation came to the public mind in the late 60's early 70' the populace was willing to limit family size. China didn't have this influence and had to pass Law to limit family size. In the 70's you had "ALL in the family" which showed how bigotry was used. In the 80's and 90's you had comedies which portrayed homosexuals, gay and lesbian, in a more human frame which changed how the populace thinks, that's why theirs now 15 States with gay and lesbian marriage. The news media, now 90% controlled by 6 corporation, only give selected story's so as to set the populace mind in curtained direction. A person is only as good and the information their given in any arena.