In honor of Anna Karenina is called the principle of explaining the ability of economies to adapt

Leo Tolstoy's novel "Anna Karenina" begins with the phrase: "Happy families are all alike; every unhappy family is unhappy in its own way." On the basis of this aphorism launched the so-called principle of Anna Karenina, which is used to describe systems in different sciences. For example, Jared Diamond with his help explain why people have been so few animals tamed - for successful domestication necessary coincidence of several factors, and the absence of one of them makes it impossible to domestication. Economists use the Anna Karenina principle, referring to the adaptation of the external environment and their behavior in times of crisis: all well-adapted systems have the same features, and all unadapted system can not cope with adapting in their own way.

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