From Adam Kirsch's Europe's Last Man:
No sooner had humanity emerged from a century of hot and cold wars than Fukuyama was resurrecting Nietzsche’s admonition that a world of peace and prosperity would be a world of Last Men. “The life of the last men is one of physical security and material plenty, precisely what Western politicians are fond of promising their electorates,” he pointed out. “Should we fear that we will be both happy and satisfied with our situation, no longer human beings but animals of the species homo sapiens?”
While Fukuyama appreciates the seriousness of the Nietzschean warning, he hears it from the perspective of a partisan, not a foe, of liberalism. The danger he foresees is not simply that bourgeois democracy will cause human beings to degenerate, but that degenerate human beings will be unable to preserve democracy. Without the sense of pride and the love of struggle that Fukuyama, following Plato, calls thymos, men—and there is always an implication that thymos is a specifically masculine virtue—cannot establish freedom or protect it:
It is only thymotic man, the man of anger who is jealous of his own dignity and the dignity of his fellow citizens, the man who feels that his worth is constituted by something more than the complex set of desires that make up his physical existence—it is this man alone who is willing to walk in front of a tank or confront a line of soldiers. And it is frequently the case that without such small acts of bravery in response to small acts of injustice, the larger train of events leading to fundamental changes in political and economic structures would never occur.