Why the Beatles were so great

Many say the Beatles are the fathers of rock and roll. The Beatles have sold over a billion albums. According to Rolling Stone the Beatles have created 4 of the 10 best albums of all time, as well as 23 of the 500 best songs of all time. You might ask yourself, how did they do it? The Beatles had 3 song writers in their band. Most bands have one. The Beatles producer, George Martin was often referred to as the fifth Beatle.