In a utopian civilization, in order to keep the peache and security, there will be a shield coming fown from the sky. If there is a conflict between two people or more, a tube will come to the ground. The tubes are controlled by a monitor that detects stress, anxiety levels in a specific area. The monitor will then send tubes to surround the pople. The tube is lightweight it can't harm anyone but is strong enough to resist bullets, sharp object, and pull of push force from within and out. The tube won't go up until but or all parties are calm. Tubes have the ability to move around.