The early 20th century is often referred to as the "Golden Age" of entertainment. During this period, cinema, radio, and theater were the primary sources of entertainment for the masses. Movies like "Casablanca" and "The Wizard of Oz" became iconic classics, while radio shows like "The Jack Benny Program" and "The Shadow" captivated audiences with their engaging storylines and memorable characters. This era laid the foundation for the modern entertainment industry, with the establishment of major film studios, record labels, and broadcasting networks.