In a surprising manner, 250 years emerges as the average length of national greatness. This average has not varied for 3,000 years.
The stages of the rise and fall of great nations seem to be:
The Age of Pioneers , The Age of Conquests ,The Age of Commerce ,The Age of Affluence ,The Age of Intellect ,The Age of Decadence.
Decadence is marked by: Defensiveness, Pessimism, Materialism, Frivolity An influx of foreigners The Welfare State A weakening of religion.