I think the world was on the edge of war.
Alien character has a small, compact, oval-shaped, translucent device that fits in the palm of your hand. It opens with the power of the mind of the person that holds it. Inside are 4 or 5 pill, elongated ovals,like capsules. Using the mind you can send them to any latitude/longitude you imagine. They stop the war by getting rid of all of the bad guys/people.
This is the best I have of a fragmented memory... except to say I love the film and never forgot it... except for the title!