Nothing makes a civilization more self-aware than the confrontation with another civilization. By observing their enemies, by fearing and admiring them, by learning from them, by trying to outmaneuver them in economics and geopolitics, and by trying to vanquish them, a civilization becomes aware of its unique history, culture, religion, politics, and psychology. In his novel Dead Lagoon, Michael Dibdin writes: "There can be no true friends without true enemies. Unless we hate what we are not, we cannot love what we are. These are the old truths we are painfully rediscovering after a century and more of sentimental cant. Those who deny them deny their family, their heritage, their culture, their birthright, their very selves! They will not lightly be forgiven.” The rivalry between civilizations runs parallel to the political and cultural rivalries within the civilizations, and both are a necessary condition for the evolution of mankind.