They were the greatest and most important act of the rock era, and introduced more innovations into popular music than any other rock band of the 20th century. They were among the few artists of any authority that were at the same time the best at what they did, and the most popular at what they did. Steadily creative and experimental, the Beatles grabbed a hold of the international mass notice in 1964 and never let go for the next six years, always staying ahead of the bunch in terms of creativity, but never losing their ability to communicate their increasingly stylish ideas to a mass au…
