Check out Brilliant: http://brilliant.org/todayifoundout If you happen to like our videos and have a few bucks to sp→→Subscribe for new videos every day! https://www.youtube.com/user/TodayIFoundOut?sub_confirmation=1 Never run out of things to say at the water cooler with TodayIFoundOut! Brand new videos 7 days a week! More from TodayIFoundOut: The Badass Story of the First Helicopter Pilot to Receive the Medal of Honor https://youtu.be/HrWmJuaLW4I In this video: In 1968, an expert on animal behaviour and population control called John B. Calhoun built what was essentially a utopia for mice that was purpose built to satisfy their every need. Despite going out of his way to ensure the inhabitants of his perfect mouse society never wanted for anything, within 2 years virtually the entire population was dead. So what happened? Want the text version?: http://www.todayifoundout.com/index.php/2018/12/that-time-a-guy-tried-to-build-a-utopia-for-mice-and-it-all-went-to-hell/ Sources: https://eprints.lse.ac.uk/22514/1/2308Ramadams.pdf https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1644264/pdf/procrsmed00338-0007.pdf https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1644264/ https://circulatingnow.nlm.nih.gov/2018/01/11/the-falls-of-1972-john-b-calhoun-and-urban-pessimism/ https://books.google.co.uk/books?id=qlm3AAAAIAAJ&q=John+B.+Calhoun+the+beautiful+ones&dq=John+B.+Calhoun+the+beautiful+ones&hl=en&sa=X&ved=0ahUKEwjFhPXjjIjRAhVMMlAKHbcNDc4Q6AEIJTAC http://www.cabinetmagazine.org/issues/42/wiles.php http://www.smithsonianmag.com/smart-news/how-mouse-utopias-1960s-led-grim-predictions-humans-180954423/ https://en.wikipedia.org/wiki/John_B._Calhoun