Meaning behind lyrics?

Anyone know the meaning behind the lyrics of the Beatles song "Come Together"? If so, can you help me out?

Thanks.

The song's history began with Lennon writing a song for Timothy Leary's failed gubernatorial campaign in California against Ronald Reagan, one which promptly ended when Leary was sent to prison for possession of marijuana. It was transformed by Lennon into a track with digs at McCartney and Harrison interspersed alongside tales of his Bagism movement with wife Yoko Ono

it was an anology, about big brother, or the establishment, ie, references to fbi, here come ole flattop

also, meaning, they wont be happy till im dead, ie, come together , right now, over me

it's just john's songwriting randomness...

songfacts.com good site

JUST HE WANTED EVERYONE TO GET TOGETHER AND BE HAPPY AND BE OVER HIM, OR WITH HIM TO PARTY AND HAVE SEX