Speech by Martin Luther King, Jr. against the "triple evils of racism, economic exploitation, and militarism."

This speech was released by Black Forum records, a subsidiary of Motown, and went on to win a Grammy (in 1972, according to Wikipedia, in 1970, according to Grammy website) for the Best Spoken Word Recording.

Excerpts of a Sermon at the Ebenezer Baptist Church on April 30, 1967.

You can replace "Vietnam" with any of the other continuous and ongoing wars the United States has instigated or been at the forefront of, and this speech will still ring true.