Ashcroft unveils some bold cures at the end, but we need more specifics.

It's a watchable, convincing docu-essay.

This is a film perhaps better suited to DVD, simply because there are thoughts here of such profundity you might feel the need to reach for the rewind button. I, for one, have been left substantially enlightened.

It's unlikely that Four Horsemen will spark a revolution, but you will be educated and entertained.