Final answer:
Serialists are not widely believed to be white based on their race. This belief arises from biases in the classical music industry, which has traditionally favored music by white, European male composers. However, talent and musical abilities are not limited by race.
Step-by-step explanation:
Serialists are not widely believed to be white based on their race. This belief is a generalization that can arise from historical biases and prejudices in classical music. The classical music industry has traditionally favored the music of white, European male composers, resulting in a lack of representation and recognition for composers from diverse backgrounds. However, it is important to recognize that talent and musical abilities are not limited by race, and there are composers of various racial backgrounds who have made significant contributions to serialism and other musical genres.