Having a history of four thousand years, China is the oldest nation on earth. Within her total area of 4,278,352 Square miles, she has a population of 400,000,000 people. The question, “What makes China continue her civilization for four thousand years without a failure while other ancient nations such as Egypt and Rome have died long-ago?" has been asked continually. Among many reasons one of the most important and one which has deepened the root of national existence is--conservation.
Ling, W. M.
"China, an Objective Lesson in Forestry,"
Ames Forester: Vol. 10
, Article 9.
Available at: https://lib.dr.iastate.edu/amesforester/vol10/iss1/9