You have to understand. I grew up in the 1950s and 60s. Activism was a part of my childhood, like Dora the Explorer instructs children today.
Radio and TV stations were independently owned and played whatever suited their style. And, what caught on and suited many AM styles were songs of social betterment. Rather than singing kiddie songs to sell congruently marketed toys and brands, we children got behind spreading the word, the call to action. So, at camp we sang, "If I Had a Hammer" and "Where Have All the Flowers Gone?," moving folk songs about making the world a better place. We raised our voices up as well as eight to ten year year olds possibly can, hoping to convince people improvements needed to be made.