http://finance.yahoo.com/banking-budgeting/article/111060/the-rise-and-fall-of-america
《窮爸爸，富爸爸》的作者寫的這篇文章寫的有些道理。 其中講到世界上最偉大的文明國家興盛時期大約有200年，走過以下循環過程：
The average age of the world's greatest civilizations from the beginning of history has been about 200 years. During those 200 years, these nations always progressed through the following sequence:
• From bondage to spiritual faith;
• From spiritual faith to great courage;
• From courage to liberty;
• From liberty to abundance;
• From abundance to complacency;
• From complacency to apathy;
• From apathy to dependence;
• From dependence back to bondage.
