As John Henry Wigmore wrote in 1929, "the jury... adjusts the general rule of law to the justice to the particular case", ie. the jury can bring justice in a case where the law itself does not allow it.
Law and justice are from time to time inevitably in conflict. . . . The jury . . . adjusts the general rule of law to the justice to the particular case. Thus the odium of inflexible rules of law is avoided, and popular satisfaction is preserved . . . That is what jury trial does. It supplies that flexibility of legal rules which is essential to justice and popular contentment. ~John Henry Wigmore, American jurist, 20th century