Yield Brother actually has been painted expressly for the [Bertrand Russell Peace] Foundation and in it I have incorporated a symbol which the "Ban the Bomb" people use . . . They have adopted this symbol which is actually an old medieval symbol, and it is "death to man" is the significance of it. And, of course, that's what the bomb stands for.
— Robert indiana
Richard Brown Baker, Oral history interview with Robert Indiana, 1963 Sept. 12–Nov. 7, Archives of American Art, Smithsonian Institution, pp. 2–3.