because we always need to keep it in mind. Even though it was hundreds of years ago, people are still just as equal as they were in the 1800s. Nothing has changed. Everyone is still special and needs to be treated fairly.
The Gettysburg Address touched several topics such as human equality, peace and honoring soldiers. The Gettysburg Address is still relevant today due to its motivational words towards human equality and paying tribute to war veterans.
It doesn't really matter what the public thinks because people have different views on things so can't take an opinion without analysing the situation based on someone else's opinion.