Typical family and friends. But I'd also fight and die for a true cause, such as being invaded by an oppressive enemy and taking up arms to join a rebel group. In a post societal situation I'd kill anybody who intends to do me or anybody else harm and won't stop till the threat is neuralized
Let's hear it guys. No jokes, what are you willing to take a life for? What are you willing to lay down your life for? Why?