Please help me with this song

Hi everyone, I need some help. I recently heard and liked Chris Daughtry's All these Lives and I shared it with some of my non-native English speaking friends. However, they came to me asking what the song was about. I tried to explain it, but was at lost for words. The truth is, I am not certain myself about the theme of this song. It appears to be about a social issue, like abductions or something but I'm not sure. If someone could give me some input or a clear definition for this song I would really appreciate it.
Here are the lyrics for reference:

All These Lives

Doesn't come down when she calls, "It's time for breakfast"
Momma can't get down those halls fast enough to see
Glass is sprayed across the floor from the broken window
She can't breathe anymore, can't deny what we know

They're gonna find you, just believe
You're not a person, you're a disease

All these lives that you've been taking
Deep inside, my heart is breaking
Broken homes from separation
Don't you know it's violation?
It's so wrong, but you'll see
Never gonna let you take my world from me
The world outside these walls may know you're breathing
But you ain't coming in, but you ain't coming in

Posters hung on building walls
Of missing faces
Months go by without the cause
The clues or traces

They're gonna find you, just believe
You're not a person, you're a disease

All these lives that you've been taking
Deep inside, my heart is breaking
Broken homes from separation
Don't you know it's violation?
It's so wrong, but you'll see
Never gonna let you take my world from me
The world outside these walls may know you're breathing
But you ain't coming in

Shed the light on all the ones
Who never thought they would become
A father, mother asking
Why this world can be so cold?

Doesn't come down when she calls
"It's time for breakfast"
The memories begin to fall
She asks, "When will I be free?"