Final answer:
Fitzgerald's description of the 1920s involves a shift from personal dreams to disconnected daydreams, which reflects the decade's broader sense of fragmentation and isolation post-WWI.
Step-by-step explanation:
F. Scott Fitzgerald describes his life in the 1920s as a time when his personal dreams and regrets from youth began to resolve into more abstract, disconnected daydreams. This reflection of fragmentation within his inner life mirrors the larger reality of the 1920s, a time when many individuals felt a sense of disillusionment and isolation following the aftermath of World War I and during the rapidly changing social norms of the time. His works, particularly 'The Great Gatsby,' depicted the era's indulgent lifestyles and the hollowness that often followed such excess. Fitzgerald's own life, along with his wife Zelda, embodied this 'fast-lived life' and the eventual realization of its unsustainable nature, showcasing a personal fragmentation that paralleled the societal fragmentation of the decade.