When uncivilized people lacking personal restraint introduce themselves upon civilized society, methods other than reason and persuasion are often needed to counter the use of force by amoral barbarians.
As paradoxical as it may seem; a civilized person armed with a weapon of violence may be the only way to prevent the promulgation of violence and mayhem by the uncivilized. When a person is ready, willing, and able to defend themselves against violence with the threat of violence, peace and equity can prevail. Even an uncivilized barbarian must then bend to reason and persuasion as a matter of self preservation.
The gun is the only personal weapon that puts a 100-pound woman on equal footing with a 200-pound rapist, a senior citizen on equal footing with a teenage gangbanger, and one gay man on equal footing with a carload of drunken rednecks. A gun can balance the disparity in physical strength, size, or numbers between a civilized pacifist and an uncivilized aggressor.
Speak softly and carry a big stick.
Si Vis Pacem Para Bellum