A few years before that the Beatles were just a bunch of white British guys doing covers of rhythm & blues hits; in a couple of years they turned out to be at the forefront of music, experimenting, creating, expending music horizons. This album is arguably not perfect, but it's packed with ideas and sounds and as the second part of their discography, decades of music unfold from this.
It is difficult to overstate just how revolutionary this album is. In just 4 years the Beatles had gone from a jangly boy band playing enthusiastic covers of American R&B songs to producing records of unprecedented depth and imagination. This album mixes rock and roll with surrealism, music hall with poignant kitchen sink dramas, Indian mysticism with farm animals. The final track ends with a huge crescendo that still stops me in my tracks. FabFour-tastic!