Final answer:
The main characteristic of jazz music that Wilson's view of the postwar world was summed up in is Improvisation and individualism.
Step-by-step explanation:
The main characteristic of jazz music that Wilson's view of the postwar world was summed up in is Improvisation and individualism.Jazz, a genre of music that originated in the United States in the 1920s, features spontaneous and creative improvisation by individual musicians. It emphasizes personal expression and unique interpretations of melodies, rhythms, and harmonies.By associating his view of the postwar world with the main characteristic of jazz, Wilson likely believed in the importance of personal freedom, creativity, and independent thinking in shaping the future after the war.