Frank Lloyd Wright originated the Prairie Style (open plans, horizontality, natural materials)
which was part of the American Arts and Crafts movement (hand craftsmanship, simplicity, function)
an alternative to the then dominant Classical Revival Style (Greek forms with occasional Roman influences).
he was also heavily influenced by the Idealistic Romantics (better homes would create better people)
and the Modernist Movement . Particularly the Minimalists (less is more) and Bauhaus (form follows function) which was a mixture of DeStijl (grid-based design) and Constructivism (which emphasized the structure itself & the building materials)