God protects human life in different ways. But the primary way God protects human life is through his moral law.
Negatively stated: “You shall not murder” (Ex 20:13).
Positively stated: “You shall love your neighbor as yourself: I am the Lord” (Lv 19:18).
The negative law prohibits intentionally killing an innocent human life. The positive law calls for protective actions. For example,
“When you build a new house, you shall make a parapet for your roof, that you may not bring the guilt of blood upon your house, if anyone should fall from it.” (Dt 22:8).