从古到今，人们都经常说要“以史为鉴”，这大概要算是史学最重要的功能之一了。但颇有讽刺意味的是，正是在“历史的经验值得注意”的口号年年讲、反复讲的情况下，中国大地出现了两次和平时期最大的人为浩劫（“大跃进”和“文革”），主要根源当然不在史学方面，但无可讳言 Since ancient times, people often say “learning from history”, which is probably one of the most important functions of history. Ironically, however, it is precisely in the years since the slogan “history is worth noticing” that it is repeated every year. In the vast land of China, two major man-made catastrophes occurred during the peace period (“Great Leap Forward” and “Cultural Revolution ”), The main source is certainly not in history, but there is no denying