Final answer:
The influx of Western music began as a blend of various musical traditions, leading to the creation of rock 'n' roll in the 1950s, which rapidly gained popularity among youths and marked a significant cultural shift.
Step-by-step explanation:
The influx of Western music, particularly in the form of rock 'n' roll, began as a fusion of various musical traditions. It was a result of European, African American, and other musical influences coming together to create new genres that resonated with broader audiences. The Gutenberg press earlier paved the way for widespread distribution of music, fostering demand and education in the musical arts. By the 1950s, advancements in technology allowed for the recording and redistribution of music, enabling rock 'n' roll to capture the hearts of many teenagers. This new genre was seen as rebellious, marrying African American rhythm and blues with the power of electronic instruments and amplifiers. Figures like Elvis Presley became pivotal in introducing and popularizing this sound, despite receiving significant pushback from adult society. Nevertheless, the genre's success and subsequent expansion were undeniable, helping rock 'n' roll leave an indelible mark on American culture and eventually influence music around the world.