This country has always had a populist streak, and one populist principle in particular animates the American justice system: all people, no matter how rich or powerful, are equal in the eyes of the law.But to provide equal justice, the law had to develop a way to prevent disappointed litigants from harassing judges. American courts found a most unpopulist solution to this problem: judicial immunity from collateral civil litigation.On a superficial level, this might seem ironic but without such immunity courts could not …