The STAND YOUR GROUND, or CASTLE DOCTRINE as it is also known, comes from early Roman times, but was established as law in 1628. It stated, quite simply, that a man has no duty to retreat from a place he calls home, if he has a legal right to be there. In the last century, it has been strengthened into the STAND YOUR GROUND laws,which resulted from "BEARD v US" (1895) that allowed, in addition, immunity from prosecution for criminal homicide. Currently, a majority of states have either the Castle Doctrine (home defense), the Stand Your Ground law, and/or a combination of these two. They are:
These laws are constantly being debated in Legislatures across America, and there be some I missed because they are new, or have been repealed.