Don't Be a Sucker

Let's think about us.

That was an excerpt from the educational film Don't Be a Sucker, released by the U.S. Department of Defense in 1947, and unofficially re-released over the last few years by millions of Americans, sharing it through social media.

Before that, Sinead O'Connor from her 2007 album Thank You for Hearing Me.

That's the 1969 classic Streets of London by singer-songwriter Ralph McTell.