Michael Jackson - Jam Lyrics Meaning

The lyrics about nation's coexisting. Why are are ignoring the obvious? The very first words MICHAEL says in the song are: "Nation to nation, all the world must come together..."

A musician (Michael was a singer) who "jams"
is improvising the music without any extensive preparation or predefined arrangements.

Michael notes the rhythm of the world as he sees it, that is:) "The world keeps changing, rearranging minds and thoughts..."

Michael is noting that in his eyes the world's "song" keeps changing.

Later he mentions a few personal adaptions he made in his life: "Smooth criminal, that's the man, Mike's so relaxed.
Mingle, mingle, jingle in the jungle, bum rushed to door 3 and 4's in a bundle.
Execute the plan, first I cooled like a fan,
Got with Janet, then with Guy, now with Michael 'cause it ain't hard to" [I don't have tie to go into the symbolism of life events here. Michael was often symbolizing his life events in song!]

But most clearly, when Michael says "now with Michael 'cause it ain't hard to" he is essentially saying he is now focusing his energy on himself.

He is saying that he can adapt to the changes in the world, and that it is nt too hard for he himself to "jam" during the world's song!

It's really easy to understand if you actually understand the meanings of the words themselves.