The document summarizes the driving forces of fashion from 1926-1945, including key technological, social, cultural, and historical events that influenced styles. Cinema and radio introduced new celebrity icons like Clara Bow and the Duke and Duchess of Windsor. The Great Depression and World Wars led to more casual styles using practical fabrics. Major designers like Coco Chanel, Mainbocher, and Christian Dior established their houses. Celebrities like Louise Brooks, Betty Davis, and Doris Day popularized flapper dresses, soft silhouettes, and tailored menswear-inspired looks respectively.