This is a great song about social change.  The intro seems to be done by hammering 
on the A chord (eg strum the open strings and then push down the chord quickly 
into place), and they keep doing this during the song.

                     A
There's a light on a hill
                      D
That's far out in the distance
                    G
And it calls out my name
                   A
It calls out for a change
         A
Far away voices
                    D
That want their own choices
           G
Sigh for a plea
                      D
As it calls out for a change
C   D   A
Ooh Ooh Change
C   D   A
Ooh Ooh Change
C   D
Ooh Ooh
A
We can change today
D
We can change today
G                   A
We can change today

To the root of mankind,
It bellows out bitter winds,
Youth cry out for today,
Strength to cry out for change,
Yet it seems clear to me,
It pounds inside my soul,
Why don't we all see,
We can cry out for change.
Ooh Ooh Change
Ooh Ooh Change
Ooh Ooh

Deep inside our hearts
There's a love
You can feel
It's a love that assures
We can cry out for change
The dark clouds that did dance
To the blue skies here before me
Make it plain to my eyes
We can cry out for change
Ooh Ooh Change
Ooh Ooh Change
Ooh Ooh