Josef Müller-Brockmann believed that the grid was an expression of a moral attitude — a commitment to order, clarity, and objectivity. His 1981 book "Grid Systems in Graphic Design" remains one of the most rigorous treatments of the subject. But even Müller-Brockmann knew that the grid's value was not in the grid itself, but in what breaking it could communicate when done with intention.
In web design, the grid evolved from fixed columns to responsive fluid systems. The 12-column grid became a default because 12 is divisible by 1, 2, 3, 4, and 6 — giving designers maximum compositional flexibility within a single system. CSS Grid and Flexbox gave developers the tools to express what designers had been imagining.
The most common misuse of the grid is treating it as a rule to follow rather than a structure to play against. The grid only becomes interesting when some elements align perfectly and others deliberately do not. The grid gives you a baseline; taste tells you when to break it.