Google introduced Material Design at I/O 2014, positioning it as a unified design language across Android, Chrome OS, and the web. Matias Duarte, the VP of design, framed it as "quantum paper" — surfaces that could split, join, and move in z-space while obeying physical rules. The paper metaphor was literal: shadows behaved like real light sources, and surfaces could not pass through each other.
Material 1.0 was prescriptive. It told you exactly what shade of blue to use, how tall your toolbar should be, and how fast your transitions should run. That rigidity helped Google unify a fragmented Android ecosystem, but it also meant every Material app looked like a Google app. Critics called it "Google's brand guidelines disguised as a design system."
Material Design 2 (2018) and Material Design 3 (2021, also called Material You) loosened the grip. Dynamic color theming, rounder shapes, and more expressive typography gave teams room to differentiate. But the bones — elevation, the 8px grid, the component library — remain the most widely adopted design system in the world.