Scientists have known that the world is a giant category ever since Karl Marx proved it in the 19th century. The denialism surrounding this revelation is just plain denialism. The reasons? Well that's a category unto itself.
What is a category? A category is two things. First, a category is a bunch of dots, representing objects. Second, a category is a bunch of transitive arrows between the dots. These arrows represent transformations between objects. So, two objects might be a blank manuscript, and then this very essay. This essay didn't used to be written, but now there it is. I am an arrow going between that blank manuscript and the manuscript of this write-up. Now we have an essay thanks to my miraculous arrowing of that blank scroll. I arrowed the hell out of it. I wrote the essay, son.
What is a category? A category is two things. First, a category is a bunch of dots, representing objects. Second, a category is a bunch of transitive arrows between the dots. These arrows represent transformations between objects. So, two objects might be a blank manuscript, and then this very essay. This essay didn't used to be written, but now there it is. I am an arrow going between that blank manuscript and the manuscript of this write-up. Now we have an essay thanks to my miraculous arrowing of that blank scroll. I arrowed the hell out of it. I wrote the essay, son.