A profile in courage, consistency and living life with purpose and passion, Betsy West and Julie Cohen’s documentary about Supreme Court Justice Ruth Bader Ginsburg, RBG (A-), is a stand-up-and-cheer portrait of an unlikely cultural hero. Diminutive and soft-spoken, she is hardly the most obvious person to have captured the cultural zeitgeist or to be the subject of a full-length cinematic treatment, but Ginsburg’s story sneaks up on you like the cadence of pioneering gender equality law cases she argued in a rich history in front of and behind the bench. The filmmakers do an expert job showcasing the sequences of legal cases that mark milestones in RBG’s legacy as well as her recent history of provocative and pointed dissent. We also get to witness intimate family portraits with her beloved fellow lawyer late husband, with grandkids and young people and immersed in her hobby of attending spectacular opera. The film also shows the joy of an unlikely friendship with conservative firebrand Antonin Scalia; if those two could get along, nearly anyone can find common ground. The film relies occasionally on very scarce archival footage and suffers sometimes from lack of access to the moments we may want to witness most (alas, no cameras in room for the big cases). But its fondness for its subject and its illumination of her life and times indeed reign supreme.