The right to self-defense used to include a duty to retreat. That made sense: you can defend yourself from deadly force with deadly force, but if you can safely get away from deadly force, you should by all means do so. But I guess retreat isn’t performatively masculine enough for the assortment of weekend warriors and ammosexuals who get to make the rules in this country. Most state governments now specifically reject the duty to retreat, and the most deadly form of that rejection has been codified in “stand your ground” laws in many jurisdictions.