10% Holding a Belief is Key to Swaying Mass Opinion
For an opinion or belief, 10 percent is critical mass. If that proportion of the population emphatically embraces an idea, then it will spread rapidly to the majority of the populationโฆ
"Once that number grows above 10 percent, the idea spreads like flame."
https:// www.livescience.com/15231-belief-opinion-shift-majority-minority-10-percent.html