The sixties was a decade of total change. It changed the art, the music, the clothes, the ideology... People fight for their liberty and equality, and they were many revolutions for have freedom.
The best way for expressing their own self was the music.
And The Beatles known that because with their music they changed completely the life of the other people because it was like a support for them for keep on.
The characteristic symbol of this decade was " peace".
If I can describe the 60's decade I would say that it was a decade of promise and hearbreak.