The Hitchhiker's Guide to the Galaxy
Ready for the world's greatest piece of empathy technology? It's the Point-of-View Gun. In the film The Hitchhiker's Guide to the Gallery, there is a wonderful moment describing how the Intergalactic Consortium of Angry Housewives commissioned a supercomputer to invent this unique weapon. Here's how it works: fire it at someone and they immediately adopt your point of view. A brilliant weapon to create household harmony. Unfortunately it may be a while before they are available off the shelf.
Clip on the Point-of-View Gun here.