Moral injury, defined as the lasting psychological and social effects of witnessing or perpetrating acts that violate moral beliefs, is linked to higher rates of suicide among veterans. Witnessing extreme human suffering during war can undermine beliefs about the world being safe and people being good. Upon returning home, moral injury can cause profound guilt, shame, and self-condemnation in veterans as they reflect on their experiences, leaving them socially isolated and at increased risk for suicide. While PTSD is also linked to higher suicide rates in veterans, the presence of moral injury, guilt, and shame may be an especially strong predictor. Resources for veterans like the Veterans Crisis Line aim to address these issues and prevent suicide.