America turns 250. Its greatest innovation was never a product — it was a system that let anyone build one

The article highlights how America's system of 'building free'—enabling individuals to innovate without needing permission—has driven progress and entrepreneurship since the Declaration of Independence in 1776. It cites examples like the author's father's machine shop and the creation of the Ariba Network, a digital commerce platform that facilitates $7 trillion in annual transactions.