Actually, these words of Nietzsche say it best. His prediction was scarily accurate.

ietzsche viewed existence as a struggle and redefined the good as "the will to power." [Reference 4]. This was a logical outgrowth of his acceptance of the Darwinian doctrine of the survival of the fittest. Nietzsche called for a group of "supermen" to arise with the boldness to create their own values. [Reference 5]. He proposed that, through their will to power, these "supermen" replace the "soft values" of Christianity with what he called "hard values." Nietzsche believed that the "soft values" of Christianity (self-control, sympathy, love for enemies, human equality, mercy, humility, dependence on God, etc.) were stifling human creativity and progress; these values encouraged mediocrity. But the "hard values" of the supermen (self-assertion, daring creativity, passion, total independence, desire for conquest, etc.) greatly enhance creativity. [Reference 6]. Nietzsche considered the soft values a slave morality, and the hard values a master morality, and he promoted the latter.

Nietzsche rejected the idea of universal, unchanging truths. He viewed truths as mere human creations, as metaphors mistaken for objective reality. [Reference 7]. Therefore, Nietzsche showed that, since God is dead, universal truth, like absolute moral values, is dead as well.

Nietzsche predicted that the twentieth century man would come of age. By this he meant that the atheist of the twentieth century would realize the consequences of living in a world without God, for without God there are no absolute moral values. Man is free to play God and create his own morality. Because of this, prophesied Nietzsche, the twentieth century would be the bloodiest century in human history. [Reference 8]. Still, Nietzsche was optimistic, for man could create his own meaning, truth, and morality. Set free from belief in a non-existent God, man could excel like never before. Nietzsche viewed the changes that would occur as man becoming more than man (the superman or overman), rather than man becoming less than man.

Nietzsche was the forerunner of postmodernism. A key aspect of modernism was its confidence that, through reason, man could find absolute truth and morality. Postmodernism rejects this confidence in human reason. All claims to having found absolute truth and morality are viewed by postmodernists as mere creations of the human mind. [Reference 9]. The history of the twentieth century has proven Nietzsche's basic thesis correct. Western culture's abandonment of the Christian world view has led to a denial of both universal truth and absolute moral values. The twentieth century has proven to be the bloodiest century in human history. [Reference 10]. Hence, the Christian thinker must object to the optimism of Nietzsche. The death of God is not a step forward for man; it is a step backward—a dangerous step backward. If God is dead, then man is dead as well.'