Lake of Fire is a masterpiece, a landmark accomplishment in the history of documentary cinema. I can’t recommend it to everyone – its uncompromisingly explicit medical footage of abortions will be impossible for some viewers to sit through, and its straightforward inclusion of loony-bird fringe arguments on the anti-abortion side may upset both pro-life and pro-choice members of the audience.

But while it’s certainly flawed, it is a brilliant formal achievement and an extraordinarily provocative example of the cinema of ideas. The black-and-white footage, some shot by director Tony Kaye, some from other sources, has all been digitally enhanced to have the same sharp, silvery, bright, laser-focused look. This is not superficial slickness, but a superbly effective way to glue your eyes to the screen. You’ve never seen a movie that looks like this. (I saw a high-definition video projection at Chicago’s wonderful Gene Siskel Center; I can only hope other venues will maintain the high visual standard.)

In 152 minutes, Kaye (American History X) includes a wide range of material: many talking heads, but also documentary footage of events as they happened, as well as local news coverage and even a propaganda film made by anti-abortion activists. (The film was more than a decade in the making, and the sense of events unfolding is quite powerful in the first half.)

The intent is to avoid taking a point of view, to present arguments for and against legal abortions without evaluating them. The results are certainly skewed by including the most extreme pro-life advocates, whose allegedly Bible-based rhetoric verges on insanity and whose actions lead to criminal prosecution and a death penalty for the murderer of an abortion-clinic physician. None of the pro-choice voices ever come close to this sort of appalling and over-the-top quality, and so the film may be accused of pro-choice bias.

But no one after seeing this film will ever be able to make a straight-faced argument that a developing fetus is a non-human “clump of cells.” Nor will anyone who sees it ever forget the emotional journey of its last half hour, as we accompany a young woman to an abortion clinic, and watch every step of the process. Her tears after the procedure become our own. This is a movie intended to shake you up, and unless you are made of stone, it absolutely will.