"If I Had A Hammer": Socialism's Theme Song

Today I wrote about socialism in Christianity, namely social justice and the social gospel. Mentioning it to a friend, it hit me that "If I Had A Hammer" (aka "The Hammer Song" made popular by Peter, Paul, and Mary in 1962)) would be a good theme song for that group of folks.

Here is part of the song's lyrics:

If I had a hammer,
I'd hammer in the morning,
I'd hammer in the evening,
All over this land,
I'd hammer out danger,
I'd hammer out a warning,
I'd hammer out love between,
My brothers and my sisters,
All over this land.

Well, I've got a hammer
and I've got a bell
and I've got a song to sing
all over this land

It's the hammer of justice
It's the bell of freedom
It's a song about love between my
brothers and my sisters
all over this land

~Source: Peter, Paul & Mary - If I Had A Hammer Lyrics | MetroLyrics 

Then I googled it. I found out I was more right than I thought.

It turns out, according to Wikipedia, that the song was written in support of the progressive movement and was first performed publicly by Pete  Seeger and Lee Hays (its writers) on Jun 3, 1949 in New York "at a testimonial dinner for the leaders of the Communist Party of the United States, who were then on trial in federal court, charged with violating the Smith Act by advocating the overthrow of the U.S. government."