Nassim Taleb popularized the idea of minority rule, where change is driven not by the majority but instead by a passionate minority. If something a minority insists on is fine with the majority, that generally becomes the norm.
For example, imagine you're a baker and want to sell buns. It doesn't make sense for you to make two sets of buns - one lactose-free and one "normal" - because everyone is fine eating lactose-free buns, but not everyone can eat your buns that include lactose. It's just easier to make everything lactose-free. So almost all pastries you find are lactose-free (at least in Finland).
It's key to notice the asymmetry at play: the majority must be quite indifferent to the change while the minority must be quite inflexible about it.
The idea of minority rule can be seen everywhere.
There are many more concepts in my "Mind Expander" tool (it's free)