Well, Mr. President eventually gave women their liberty. A few decades later people of color were given their liberty. The LGBT community is still fighting for theirs.
In my opinion, this is the reason that we study history. We study history so we can point out Loving v. Virginia to the Anti-Marriage-Equality people. So we can point out the segregated units to the Don't-Ask-Don't-Tell people.
These fights have been fought before. We just need people to remember, then act with compassion. Actually, lately we need the Christians to act more.. christian. Start practicing what you preach, please.*
*I mean the vocal minority that refuse to do unto others as they would do unto you and judge not lest ye be judged.