Premise: Josef Matthias Hauer (March 19, 1883 – September 22, 1959) was an Austrian composer and music theorist. He is most famous for developing, independent of and a year or two before Arnold Schoenberg, a method for composing with all 12 notes of the chromatic scale. Hauer was also an important early theorist of twelve-tone music and composition.
Hypothesis: Josef Matthais Hauer was 76 years old when he passed away in Austria, he is remembered solely for his work on developing a method for composing with all 12 notes of the chromatic scale. He accomplished this 1 or 2 years before Arnold Schoenberg. He was important early in his career as a theorist of twelve-tone music and composition.