In recent weeks, participants in demonstrations against police violence in the United States have demanded the removal of monuments to Confederate leaders who waged an insurrection to defend slavery during the American Civil War of 1861-1865. But the justifiable demand for the removal of monuments to these defenders of racial inequality has been unfairly accompanied by attacks against memorials to those who led the Civil War that ended slavery and the American Revolution, which, in upholding the principle of equality, for the first time placed a question mark on the institution of slavery. Last Sunday, a statue of Thomas Jefferson,...