If cognitive dissonance led to dementia or Alzheimer's disease, people would probably stop lying.
Cognitive dissonance hinders logical thought. Could lead to dementia and other mental illnesses?
Cruel thing to say, but in some ways, I wish it did. Does the punishment fit the crime? Varying degrees of mental illness.
They did a study and found out that "Where Gun Stores Open, Gun Homicides Increase". Naturally.
Scientific American article - Where Gun Stores Open, Gun Homicides Increase
In factories, standing below any heavy load that is being moved or supported by cranes and such is prohibited. Minimize any danger as much as possible to reduce accidents, injury, and deaths.
Shouldn't streets be safer than factories?
South Korea allows guns, but you have to be licensed, keep the gun at a police station for storage, and only allowed to check it out for a limited time for hunting or other declared purposes. Definitely contributes to a less violent society, in my opinion. Much still needs to be done with regards to violence and hate in the media, speech, books...
Of course, the military has guns and sometimes there are incidents involving soldiers killing soldiers or civilians. Incidents involving crossbows, bows and arrows, knives, bats...