The laws remove the so called 'duty to retreat' which dates from English Common Law. That tradition holds that before a person can use deadly force against an attacker, they must first take affirmative steps to defuse the situation.The Common Law "duty to retreat" applied to an affray(brawl, fight between two or more people). If you were involved in a drunken brawl, or a fight over who disrespected who, then each participant has a legal duty to retreat rather than escalate the level of violence.
This "duty to retreat" did NOT give any duty to retreat from robbers, rapists, etc.
“...they must first take affirmative steps to defuse the situation”
IMHO, a perp contracting a sudden case of terminal high-velocity lead poisoning will most affirmatively “defuse” the situation.
I approve.