When we think about ourselves as the human race, what really differentiate us from the other species are the "things" that had made up our society. Looking back beyond the prehistoric time, the "threshold" that defined us as "human" is when the apes discovered the use of a tool - that tool is a "Thing" in which we have used to build civilization, creating cultures and eventually it's the "things" that is responsible for our arrival as a species today. why are things so important? as mentioned, "things" although unanimated, played an important role in shaping our behavior and our society. The simplest thing like the hinge on a door actually made a lot of difference in terms of how we interact with a space. In this case if there's no such thing as a door hinge, it would take a lot of effort, energy and time to firstly, destroy a wall in the order to get inside, then rebuilt it to closed it - all of these "humans" use to perform the same task of getting into a room and closed the opening is replaced by this non-human "thing", a door hinge. In a way, a hinge contains the essence of those humans needed to do this "operation". Thus, in another way, these "thing" in our life is actually part of who we are, we are so accustomed to these "thing" that many times it has been embedded into our nature, this relationship between human beings and non-human "things" played such a large part in our life that when this relationship is broken, as in the case of the Israeli troops "walking through wall", the relationship between the wall and human has been broken - the wall is unable to perform its "function" as a "thing" that would protect us from the danger outside no longer, thus, humans loose the trust in the "thing" and its why this theory was so successful in creating trauma.
Besides from responsible for our humanistic progression, the "things" in many cases also define who we are and how we are seen by others, in a way, it's almost as if these "things" are heterotopias where it would allows us to have a better understanding. The things can also define how we perceive others as well from their interaction with the things and how that interaction, relates to us. Vice versa, our interaction with the things also indicate how others will perceive us as well. Moreover, in some cases, it's the non human "things" that can determine our human action / interaction, such as uniform, students wearing uniforms and lecturers do not - this uniform - a "thing" automatically suggests a hierarchy in which we, humans tend to follow.
The interesting role of the "things" in our life is highlighted in the film "objectified" where it took us through some of the "behind the scene" production, seeing how each "thing"/product were designed and manufactured. One of the main thing I saw is that there're a vast amount of time / thoughts being put into the production of these "things" that sometimes, it may seem so small and unnoticeable but actually responsible for making our life much easier such as a handle of a scissors for instance. One of the most successful "things" right now is the Apple products and the main thing I got from seeing Apple's design process is that they tried to make their product as related to the users and users friendly as much as possible. In fact I feel that the reason behind the success of Apple product might even come from the fact that they understand the relationship that these non-human things have with us and that these "things" actually shaped the way we behave and shaped the society in which we're living in.