Have you heard of the Broken Window Fallacy?

I had not.  I first saw it on Wizbang, followed the source to Fausta and then to the original source of Cubachi.  It is a great little video but to understand it better be sure to read the whole of the post on Cubachi where this is explained:

The video titled “The Broken Window Fallacy” is a play on Frédéric Bastiat’s 1850 essay Ce qu’on voit et ce qu’on ne voit pas (That Which Is Seen and That Which Is Unseen) to illuminate the notion of hidden costs associated with destroying property of others.

Now go read the parable.