U.S. Supreme Court Justice Ruth Bader Ginsburg is one of the most accomplished women in America’s history and a pop-culture icon, too. She’s on T-shirts. She’s on mugs. She accessorizes her robes at the neckline with an assortment of stylish jabots that court-watchers read like tea leaves to see which way she might be leaning. A relentless voice on the bench for women’s equality and civil rights, Ginsburg has been the subject of a best-selling book, an Emmy-winning documentary, and the Hollywood biopic On the Basis of Sex. Now, a traveling museum exhibit inspired by and named for the book...