What Keeps Mankind Alive?

"What Keeps Mankind Alive?" is a song composed by Kurt Weill with lyrics by Bertolt Brecht for their drama with music The Threepenny Opera which premiered in Berlin in 1928 at the Theater am Schiffbauerdamm. The title refers to the central line from the finale of act 2, Denn wovon lebt der Mensch?. In the play, the two stanzas of the strophic piece are sung by Macheath and Low-Dive Jenny and the final line is sung in fortissimo by the chorus.
It is an agitprop socialist anthem expressing that the comfortable lifestyle enjoyed by the rich is paid for by the suffering of the masses. The lyrics begin : "You gentlemen who think you have a mission / To purge us from the seven deadly sins / Should first sort out the basic food position / Then start your preaching, that's where it begins." The song ends with the conclusion, "For once you must not try to shirk the facts / Mankind is kept alive by bestial acts."
Translated into English by Marc Blitzstein, Willett / Manheim, and Michael Feingold, the song has been covered by Tom Waits, the Pet Shop Boys, William S. Burroughs, and others. The opening chapter in The [League of Extraordinary Gentlemen, Volume III: Century] is named "What Keeps Mankind Alive?", repurposes elements of The Threepenny Opera, and ends with a new translation of the song by Alan Moore.