This is a film about genocide, but don’t let that deter you—it may very well be the most inspiring film you’ll see this year. Rafael Lemkin, a somewhat rumpled Polish lawyer, committed his life to criminalizing mass killing and gave the act the name genocide. Journal entries, which filmmaker Edet Belzberg illustrates with spot-on animation, show us how Lemkin was just a young farm boy when he first began contemplating the causes of genocide—years before Hitler invaded his native land. We are introduced to four extraordinarily courageous people, including UN Ambassador Samantha Powers, who embody Lemkin’s vision of using international law to hold killers accountable. Especially memorable is the relentlessly cheerful lawyer Benjamin Ferencz, whose own Lemkin-esque campaign is to make the very act of starting war a crime. In the end, it is Ferencz who provides the meaning of the film’s mysterious title, and gets to the heart of why filmmakers make documentaries.  RS