This week on The Learning Curve co-hosts U-Arkansas Prof. Albert Cheng and DFER's Alisha Searcy interview POLITICO's Peter Canellos, biographer of Justice John Marshall Harlan. Mr. Canellos delves into Harlan's upbringing in a prominent slaveholding family, his Civil War service in the Union Army, and his rapid rise in Kentucky politics as a Republican. He highlights John Harlan’s mixed-race half-brother Robert Harlan and key legal precedents like the notorious Dred Scott v. Sandford (1857), which influenced Harlan's views on race and equality. Canellos explores Harlan's famously farsighted dissent in Plessy v. Ferguson (1896), emphasizing its significance in laying the groundwork for future civil rights legal victories, notably Brown v. Board of Education (1954). In closing, Mr. Canellos reads a passage from his book, The Great Dissenter: The Story of John Marshall Harlan, America’s Judicial Hero.