everything everyone can percieve is a human invention, not necessarily an invention, but a product. A computer, a window, a car, and even natural things like a tree, when you are a child someone will point to it and say, thats a car, thats a tree, and so on, you do not know these things instinct. And thus the world does have shared thoughts, as though there are physical characteristics about objects that can be related to and put a name in front of, have usual feelings for. the world is huge and there are always variations in feelings, but surprisingly a small amount who actually warp their reality. What I am trying to say is that humans do make the world, they dont realize it though, they think it is the way it is. If I suddenly think I am god ( god is as well a human invention, to explain something that cannot easily be understood ) and decide everyone must die, go around shooting people, I would get arrested and thrown in jail, because I dont work, noone agrees with me, and therefore I am wrong, the majority makes fact, it is sad that sometimes people forget this, yet a the same time strength makes fact, sometimes people forget this as well. Above all this, if everyone thought I was god, then for all practical purposes I would be god. It is a true genius who is able to deal with things not for all practical purposes.