The past is relevant because there is much to learn from it. Not everything is relevant of course. It is not important to know exactly who killed who in a war for example. The relevant part to know is why the war was started. I didn’t used to care about history because I couldn’t go back and change it. Now I try to learn from it. Sadly, there are many things in history that are irrelevant to us now. Cultures and languages change a lot. Some things are best forgotten, but there is some truth to be found in any book no matter how old.