High Quality Content by WIKIPEDIA articles! "Beyond the Pleasure Principle" (first published in German in 1920 as Jenseits des Lustprinzips) is an essay by Sigmund Freud. It marked a turning point and a major modification of his previous theoretical approach. Before this essay, Freud was understood to have placed the sexual instinct, Eros, or the libido, centre stage, in explaining the forces which drive us to act. In 1920, going "beyond" the simple pleasure principle, Freud developed his theory of drives, by adding the death instinct, often referred to as "Thanatos," although Freud himself never used this term.