Depends how far ahead you want to look. National borders, the use of lethal weapons for self-defense or law-enforcement, the entire education system. It may not always be fair since the problems these things are meant to address may be mostly gone.

A very interesting perspective to me is how many things start out as improvements in society or quality-of-life, but end up viewed as the opposite after history progresses enough to take their benefits for granted and pick out flaws in them.