This article surveys the Torah’s teachings on the right and the duty to defend oneself and others. Part II examines the Book of Genesis, in particular, the “Jewish natural law” which was given to Noah, and the story of Abraham, the patriarch of the Jewish people. Part III studies Moses and the Exodus of the Hebrew people from Egypt. Part IV looks at Torah laws regarding home defense against burglars, and the duty of bystanders to rescue third parties who are being attacked by a “pursuer.” The examination of the Torah laws includes analysis of the extensive Jewish scholarly commentary on the Torah. Part V turns to the Sixth Commandment, whose language “Thou shalt not kill,” has been frequently, but implausibly, misconstrued as a prohibition on self-defense. The article concludes that the Torah clearly creates a right and a duty to defend oneself and others.