Very simple reason. Too many innocent people are being killed only under the pretext that the Constitution is giving us the right to bear guns. I guess our Fathers really believe that the war with England and the Natives would last for ever. I don't think they meant it to be used to kill our neighbors for just " because." For all I know the constitution was not written by God. Far from it. I think all guns should be mounted by some kind of detection device to alert us that someone carrying a gun is walking among us. Well if we can land on the moon I can't see why we shouldn't be able to come up with such a device. To make it easy for the people who enjoy hunting the device could be set to go on when sensing a human. Well if you can't change the Constitution then at least try to do something with the guns period. Time to get to work people.