The actual name of the requested tune appears to be Pass It On, written by Millard Lampell. It's sung by Judy Collins on the soundtrack of "The Inheritance", a video presented by the Amalgamated Clothing Workers of America. (See info below.) Art and Sandy, you're both amazing!

Lin

Found at this site.

The inheritance [videorecording] / written by Millard Lampell ; directed by Harold Mayer ; produced by Harold Mayer. Short version New Milford, CT : Harold Mayer Productions, c1985. 1 videocassette (42 min.) : sd., b&w ; 1/2 in. Presented by the Amalgamated Clothing Workers of America. Made in 1964. Cameramen, Edmund B. Gerard, Jesse Pailey, Leonard Stark ; editor, Lawrence Silk ; narrator, Robert Ryan ; music, George Kleinsinger ; consultants, Maxwell Brandwen, Sol Brandzel, Howard D. Samuel. Summary: Portrays the history of early twentieth-century immigration to the United States, the social and economic conditions of the immigrants which influenced the development of the trade union movement, and the cultural changes which resulted. Includes archival photographs and newsreel footage.