The past can teach us many things. We can see how unjust our society was to some people before major Supreme Court cases were decided. We can imagine how simple some aspects of life were before cell phones tethered us to work.
It's also fun to look back and see just how much further a dollar seemed to go back then. Undoubtedly you've heard some relative reminiscing about the days when a nickel would buy you four movie tickets and you'd still have some change left.