American structuralism began in the 1930s-1960s as a reaction to European structuralism of the 1920s. It focused on describing observable speech rather than abstract concepts like langue. The main points were:
1) Linguistics should be a descriptive science based on analyzing observable speech and classifying phonemes, morphemes and sentence patterns.
2) The primary form of language is spoken, not written.
3) Every language is a unique system that should be analyzed independently without comparison to other languages. Meaning was considered unscientific and excluded from analysis.
The goal was to develop objective, rigorous procedures to segment and classify linguistic units based on their form and distribution through speech samples.