The Golden Apple of Discord is probably the tale in Greek mythology that best illustrates how conflict is undesirable and leads to upheaval. The story begins with a divine banquet that Zeus organized to celebrate the marriage of Peleus and Thetis (e.g., Graf, 1996). A banquet is a pleasant event and Zeus decided to avoid trouble by not inviting Eris, the goddess of discord. But, as often happens, exclusion leads to frustration and aggression: Eris crashed the party and threw in the middle of the invitees a golden apple with the inscription καλλίστῃ (kallistēi, 'for the fairest one'). Note that the use of the superlative adjective made it clear that only one was entitled to receive the apple, and three goddesses started disputing such privilege, namely Hera, Athena and Aphrodite. Soon it was clear that no negotiation was possible, that there should be only one winner, and the goddesses resorted to require the judgment of a mortal: Paris the Trojan. Upon bestowing the coveted award to Aphrodite, Paris received both the gratefulness of the goddess of love-under the form of the most beautiful woman on Earth, Helen-and the hatred of the other two, especially Hera, as well as that of all the Greeks, who waged war to Troy at once. An apparently mundane conflict led to bloodbath and destruction in the most famous war of ancient times. Gabriel Mugny, Conflict and Social Influence Gabriel Mugny, throughout his long and prolific career, has embraced quite a different view of conflict, and worked relentlessly to uncover the social-psychological mechanisms that lead conflict not only to negative outcomes, but also to positive and constructive consequences. Right