Form Follows Function
Louis Sullivan · 1896
"A structure's shape should be dictated by what it needs to do, not by decorative tradition — form is a consequence of function, not a separate choice."
Sullivan coined the modernist movement's founding rule in a single 1896 essay: form ever follows function. Strip away ornament that doesn't serve a purpose, and the true shape of a thing reveals itself.
Writing about skyscraper design in 'The Tall Office Building Artistically Considered,' Sullivan argued that nature never puts a decorative flourish where it doesn't serve survival — a hawk's wing is shaped by flight, not fashion — and buildings should follow the same logic. The phrase became the rallying cry for Bauhaus and modernist design decades later, though Sullivan himself still used plenty of ornament in his own buildings.
What point was Sullivan actually making with 'form follows function' in his 1896 essay?
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The explanation above is written with AI assistance. These are the originals — go to them to check it.
- Form follows functionWikipedia
- The Tall Office Building Artistically Considered (1896, primary source scan)article
Affordances
"Objects and environments don't just have properties — they signal what can be done with them, and that signal is what actually guides behavior, not conscious analysis of physical properties."