To answer this, it takes one Tesla to electrify the world.
After that, it just takes time.

Before that, it takes a bunch of people looking for a solution to a problem. Both the definition of the problem, and the diagnosis of the solutions are important.

A modern day example, that you can watch happening is

Taxation is theft

And, we will see several things forming around it

• our taxes are not going for things we want. (no more war)
• our money is not being well spent (10% actually gets to the destination)
• what else have we been lied to about?

And so, almost all at once, Americans will stop paying federal taxes.

The operative thing is that the average person can't even understand the money flows. Not until much smarter people have analyzed all the pieces, and then distilled it down to much easier to understand analogies.

There are always the trail blazers.