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Culture provides a shared experience making it easier to communicate with each other. Importantly it also provides a way for society to discuss and think about ideas as a group. That culture includes books, films, TV shows, songs, video games, oral storytelling, folk songs, etc. Each bit of culture builds upon what came before, and what is happening at the same time. The record of culture is forever imperfect, but that becomes more of a problem when parts of culture are lost for the future to be able to look at it. That loss makes it progressively harder for us to look to the past and actually understand it, besides making it harder to communicate with each other. Lack of the reference and understanding can help to perpetuate stereotypes, misunderstandings, injustice, or even actively damage stability of a society. While we are resilient, why would we want to make it harder and lose the knowledge of how we got here?

This article is arguable about forgetting a bit of history which has helped to perpetuate racism. Be aware this is about a "virulently racist song", if that is a problem or trigger you probably shouldn't read any further. Just know the roots of the ice cream truck song in the US at least is horrible and we should not use it. https://www.npr.org/sections/codeswitch/2014/05/11/310708342/recall-that-ice-cream-truck-song-we-have-unpleasant-news-for-you