Actually not a school that is a necessity for us, but learning. Why? The first, because learning makes us understand more about the world and everything in it. For example, by learning we can know that there are 400 billion stars in the Milky Way galaxy [imagine how many planets are there?], There are hundreds or even thousands of undiscovered animal species [is it possible that you will be the inventor of one?] And there are 8,000 languages used by 7 billion people in the world today [how many languages have you mastered?].