Episode 153 - Self-defense at home and abroad

From a pair of killings in New York City to the actions of Israel and Russia internationally, how we view these incidents often seems to be tied to how we view the concept of self-defense. Is there an innate right to self-defense? If not, who can claim self-defense and against whom? Is the right of self-defense tied to the means? If so, how far does it extend? What does it permit? Can self-defense only be invoked as a reaction to something/someone else? Can it be preemptive? We try to tease out our own thoughts on these questions in this conversation.