A Small Talent for War is an episode from The Twilight Zone.
John Glover is an alien emissary from a race that supposedly genetically engineered humanity. He directly challenges the United Nations (UN) to prove humanities worth, citing how wasteful and warlike we are. With the survival of humanity at stake the UN hurredly establishes an accord for lasting global peace and presents it to the emissary. The emissary is unimpressed however; it's not peace they wish to make humans aspire to.