Nonsense. They won by appealing consistently to the conscience of the nation as concerns EQUALITY before God and the law.
"We the People of the United States, in Order to...secure the Blessings of Liberty to...POSTERITY, do ordain and establish this Constitution for the United States of America." "No person shall be deprived of life without due process of law." "No State shall deprive any person of life without due process of law; nor deny to any person within its jurisdiction the equal protection of the laws.""We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable rights, that among these are life, liberty and the pursuit of happiness. That to secure these rights, governments are instituted among men..."