There is a scene in The Gay Science (1882) that is one of the strangest and most consequential passages in modern philosophy. A madman runs into a marketplace in the middle of the day, carrying a lantern. People gather, laughing at him. He cries: "God is dead. God remains dead. And we have killed him." He then asks: "How shall we comfort ourselves, the murderers of all murderers?" The marketplace crowd, composed of atheists who have already stopped believing in God, have no idea what he is talking about. The madman concludes: "I have come too early."
This scene is routinely misread as Nietzsche's announcement that atheism is true. That is not what it is. As the SEP notes, the atheism of the marketplace crowd is already assumed. The point is something far more radical: that the entire moral and metaphysical framework of Western civilization was grounded in the Christian God, and the collapse of that grounding has consequences that most people have not yet begun to process. It is not just that heaven and hell are fictional. It is that the values of equality, compassion, the sanctity of every human life, the belief that suffering has meaning, the conviction that history moves toward justice, all of these had their foundation in Christian theology, and that foundation has crumbled. The God-shaped hole in Western culture is not being filled by reason and science. It is simply there, covered over by habit and unexamined assumption.
Friedrich Nietzsche (1844–1900) was a German philologist and philosopher who spent his extraordinarily productive but brief intellectual career (he collapsed into madness in 1889) doing something almost no philosopher does: following an argument to its most uncomfortable conclusion without flinching. His conclusion, developed across The Birth of Tragedy (1872), Human, All Too Human (1878), Daybreak (1881), The Gay Science (1882), Thus Spoke Zarathustra (1883–85), Beyond Good and Evil (1886), and On the Genealogy of Morality (1887), is this: European morality is not only false but actively harmful to the development of the highest human possibilities, and it needs to be destroyed and replaced, not reformed.
A clarification that is philosophically essential: Nietzsche is not a critic of all morality. As the SEP notes, he distinguishes between "morality in the pejorative sense" (MPS), what he is attacking, and a higher morality appropriate to higher human beings. MPS is characterized by three commitments: it presupposes free will (which Nietzsche thinks is philosophically indefensible). It treats all persons as morally equivalent (which Nietzsche thinks is empirically false, people differ enormously in type, capacity, and what conditions allow them to flourish). And it prioritizes the welfare of the weak and average at the expense of the conditions necessary for genuine human greatness.
The attack is not, then, a celebration of cruelty or an endorsement of domination. It is a diagnosis: that the moral system that has governed Western civilization since the triumph of Christianity is built on psychological and metaphysical falsehoods, and that these falsehoods have had an identifiable historical cost: the stunting, flattening, and domestication of human excellence. Nietzsche's question throughout his mature work is: what would it look like to live beyond this morality? What kind of human being could create new values from a position of genuine strength rather than inheriting a value system born of weakness and resentment?
Famously, and this is one of the things that makes him so dangerous to read carelessly, his sister Elisabeth appropriated his unpublished notebooks after his collapse and edited them into a collection she titled The Will to Power, arranging them to serve her own proto-fascist political commitments. The result was that Nietzsche was associated with Nazism for decades after his death, despite his explicit contempt for German nationalism, anti-Semitism, and the herd politics that Nazi ideology represented. His actual target was not Jews or other cultures. It was the specific psychological type he called the last man, the comfortable, contented, mediocre modern person who has invented happiness and blinks.
Quick reflection
Nietzsche's madman says he has come too early: the death of God is an event whose consequences most people have not yet registered. Try to identify two or three moral beliefs you hold that depend, at least historically, on a Christian foundation (the equal dignity of all persons, the moral significance of individual conscience, the importance of compassion for the weak). Now ask honestly: if you cannot appeal to God or to some equivalent metaphysical grounding, what *is* the foundation for these beliefs? Does Nietzsche's diagnosis land for you, or do you have a convincing non-theological grounding?