帮我解释一下这首英文歌的意思

In my dream,
children sing
a song of love for every boy and girl .
The sky is blue and fields are green
and laughter is the language of the world.
Than I wake and all I see is a world full of people in need.

Tell me why(why),
does it have to be like this?
Tell me why(why),
is there something I have missed?
Tell me why(why),
cos' I don't understand,
when so many need somebody,
we don't give a helping hand.
Tell me why?

Every day,
I ask myself,
what will I have to do to be a man?
Do I have to stand and fight,
to prove to everybody who I am?
Is that what my life is far,
to waste in a world full of war?

Tell me why(why),
does it have to be like this?
Tell me why(why),
is there something I have missed?
Tell me why(why),
'cos I don't understand,
when so many need somebody,
we don't give a helping hand.

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