public service announcements

In the early 50s, even the NBC flagship station in NYC couldn't sell all the advertising spots they'd left room for between programs, so they ran public service announcements.

See your army recruiter, he's.. your opportunity man.
Only you can prevent forest fires.

Then, they had "brotherhood" spots with animation that made Speed Racer look like high tech.

George Washington liked good roast beef. Haym Solomon liked fish. But when Uncle Sam served liberty they both enjoyed the dish. I may not know a lot of things, but one thing I can state: both native born and foreign born have made our country great.

And there was a cartoon trapeze artist who wouldn't grab hold of the arms of the guy sent out to catch him in mid air because the guy was the wrong color or the wrong religion. He got three chances. When he turned down the 3rd guy, he fell, and the announcer said "Oh Joe, you Schmo!"
Chorus: Don't be a schmo, Joe, be in the know, Joe. Religion and race just don't count in this place. So, be in the know, Joe, wherever you go, Joe. Remember that and you won't fall on your face.

(I think the trapeze artist's name was Joe.)