The battle (good vs. evil) rages. It's in every human heart. You obviously sense it, as indicated by your mention of your own conscience (who needs a conscience if there isn't an internal struggle between good and evil?).
I was suggesting that to blame religion for death and destruction is to unfairly scapegoat religion. Every civil institution is subject to a constant and whithering attack from people bent on corrupting it for their own purposes. Some institutions stand, others fall. Those with a fighting chance are the ones that acknowledge and take precautions against man's sinful nature from the outset (I would humbly submit that Christianity and the United States of America are two of these). Those that presume to serve an inherently good humanity are doomed to a "short, nasty and brutish" existence.
That's why the song irks me so much. It may be only a song, but it serves to indoctrinate the sheeple into believing that the world would be Utopia if only man were left to his own devices. But to blame governments and religions for man's downfall is self-deceiving folly. The reality is the opposite.