What did the world look like before Sesame Street?

November 10, 1969 -- it was a different world. The idea of public broadcasting was new. There were no cable networks yet. The dial only went up to 13.

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We forget how much the world has changed since Sesame Street started teaching all Americans to read. According to Virginia Heffernan of The New York Times, the Sesame Street Season 1 has been labeled not suitable for children. She quotes the DVD case: 

These early ‘Sesame Street’ episodes are intended for grown-ups, and may not suit the needs of today’s preschool child.

I'm really curious - those of you who remember the world before Sesame Street: what changed?