Size of book a person writes

While I look at the various theses of those before me, I see variety of thicknesses. I wonder why, why different people wrote different thickness of theses, for the similar kind of degree program. Well suppose its because of, different people have different work capacity, different people work on different topics of various loads, some do more work and write less, while some do relatively less work but write as usual (which appears relatively more).

Somehow I started thinking of food and residence. If I can create hardware, books, software, all that, still i would be dying down at some point because I cannot yet make food, neither I have my own own place to reside here. I buy food, and rent a place that city offers. At this interface of exchange, in this not-so-empathetic sometimes savage but sometimes not-so-cruel society, I guess I will get food and other stuff only if they get my software and hardware and books or texts. At some point in my life past 4 years during PhD, I have felt that I need to work to even have a desire to eat, or be able to eat, perhaps its the unknown forces at play in this dark world, where ofcourse I don’t know the knowlege of what is happening around and the state of other people in certainty. Perhaps these dark forces guide me, or they make fun of me, I can only submit myself because I’m just a human being. But channeling those energies and getting tired seems like a process, and sometimes for some things I’m getting way too tired that I would never get back to be those things.

Anyways, so how does the size of the book is affected by the person. Some people probably prefer light mode and light working, and some want to work more, and be in a workoholic culture. Perhaps they are living, but why are they programmed for a workoholic culture, and why some people are programmed for light working. The mindset makes the difference, but there is this thing that sometimes people feel more energy while doing their work, while some people feel less. Two different people feel different amount of energies while doing the same or similar kind of work.

I have forgotten many things that I am (or human being is) those great feelings of existence and how amazing only existing can feel, and I forget those feelings to work on things which will follow.

So, again, why does different thesis sizes are different. Socialization affects people energy levels. People with a larger social circle could hold on to larger aspects of knowledge (if), then their books will be larger. What about familiy, those close ties that tie them to fundamentals. So if one has got a huge family, their book size is bigger?