Humanity is behaving in many ways that threaten to end our existence. There is a growing awareness that we are probably witnessing the 6th major extinction on our planet. The first five extinctions were caused by major shifts in nature. This one is being caused by humans. Our behaviors are very self-destructive to the point that they could arguably be labeled suicidal. I consider here how unresolved grief that pervades the collective consciousness of humanity may be contributing to our collective suicidal behaviors.