In his comments on the sixth commandment, “You shall not murder,” John Calvin writes, “The purport of this commandment is that since the Lord has bound the whole human race by a kind of unity, the safety of all ought to be considered as entrusted to each.” As creatures made in God’s image, we are called to do whatever is required to “defend the life of our neighbor; to promote whatever tends to his tranquility, to be vigilant in warding off harm, and, when danger comes, to assist in removing it” (Institutes of the Christian Religion, 2.8.39).