"Moderatin" is a very important concept for human. We can read the documents , enormous amount of sages advocated that the role of moderation is the right way.

Unfortunately , as the saying goes easier said than done. According to the human history , people always do things either too much or too less. If the merchandises are popular or good in sales, sooner or later, you can see thm everywhere. For example  just 5 years ago, suddenly, we can see the eggtarts shops everywhere , in addition, you can almost find them in all bakeries. Not long after , the eggtart effect
disappeared because most of people always prefer to somethign novel.

In my opinin ,to keep moderate is a natural effect. At last , we still move back to the middle of everything. For nstance ,about 50 years ago, Mainland China advocated the communism extremely, they beieved that the capitialism is evil, so they have to defeat the horrible adversory.

50 years later, the society has changed , the China government welcome all businesses and industries to go there. They recongize that  they can not reject the world trend because they cannot isolate themselves from the world.

In contrast , the United States emphacised that we have to bear the capitalism, so the American people consumed mroe than they can afford . Therefore , the economic depression is going to occur. Nowadays , they are shifting their direction because they are aware that some controls may be essential.
However, I believe we cannot offend the natural rules.We should keep moderation in whatever we do.