@careywedler's pretty great. That said, maybe there is no we and this isn't a movement, it's just a whole lot of people realising something and telling each other.
There was no pythagoras movement. He just discovered that in any right angled triangle the square of the hypotenuse is equal to the sum of the squares of the other two sides, and spread the word.
He might've smacked his wife around, or welched on his wagers; but his observations are still true.