It seems like an unexplainable phenomenon, but there are actually signs to follow. As long as you use the right method to support the leverage, you can also create a trend! Once something reaches the "trigger point", it will break through the threshold in no time and produce drastic changes. How do "fads" come about? Why do some fads rise to prominence and others don't? Why do unknown novelists suddenly become best-selling authors? Why did the crime rate in New York City suddenly drop in the mid-1990s? Why did the teenage smoking epidemic get out of hand?
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