Everything is Physics

Well we all know what physics is but few of us understand what physics really means and what is its real significance. Physics by definition is the branch of science which deals with the nature and properties of matter, motion, space-time and energy. But I would argue that physics is in fact the only science. Lets see if this statement can be proved or not.

Chemistry is all about chemicals and chemical reactions. Two fundamental topics that we read in chemistry are atomic structure and chemical bonding. Broadly, chemistry is the study of matter (especially chemicals) in atomic or molecular levels and the reactions or interactions occurring between those atoms or molecules. Thus, these two topics indeed form the base of chemistry. Now, you must have heard about the quantum model of atom. It is currently the accepted theory of atomic structure. Quantum mechanics, which is a part of modern physics is the base of this theory. Previously many physicists like J.J. Thompson, Ernest Rutherford and Niels Bohr have tried to explain the atomic structure by using classical mechanics. (But those theories were discarded due to the limitations and contradictions that accompany them) Through this quantum model of atom, scientists were also able to give a more satisfying theory of chemical bonding that is, orbital overlapping. Thus we see that theoretical chemistry is in fact physics. But what about the rest of chemistry? They have the least relation to physics. But the other theories and phenomenon in chemistry could be explained only because of the accurateness of the atomic theory that only quantum physics could provide. Thus we can say that existence and explanation of chemistry is possible only due to existence of physics.

Now it's turn of biology. When we hear biology, we think about proteins, DNA, RNA, amino acids, etc. These are few of the different types of chemicals that make up a functional human body. In fact, every living body is made up of chemicals. And for sustainment of a biological system, chemical reactions continuously take place at microscopic and macroscopic levels. For example, in the process of digestion numerous reactions take place on the food as it passes through the alimentary canal until it is finally broken down into simple molecules absorbable by the body or simply until its complete digestion. Thus, biology is very closely linked with chemistry and as chemistry is related to physics, chemistry acts as the link between biology and physics. So, existence of biology is also dependent (though indirectly) on existence of physics.

After physics,chemistry and biology what is left in natural sciences is earth sciences. Well, it is quite clear that earth sciences is just a correlation of physical sciences(physics and chemistry) and life sciences(biology). The areas that earth sciences cover like geology, geography, ecology, hydrology, oceanography, climatology, paleontology, etc can be completely explained by using physics, chemistry and biology. Thus, its ultimate relation to physics is quite obvious.

Apart from natural sciences there are also social sciences like law, criminology, history, political science, etc. these sciences have been created by human minds. Human minds are result of brains. Brains are explained by biology. Thus, as biology exists due to physics, social sciences do also exist due to physics.

It can be argued that formal sciences (logic and maths) do also exist and there existence is in any way not dependent on physics. Well, maths cant be considered as an actual science because the test of it's validity is not experiment. Instead, it is actually the language of science, specifically physics as physics can be explained in the most simplest and meaningful way only in terms of mathematics. And talking of logic, it is the base of mathematics.

So I think this is done here. Even I am writing this blog be cause I belong to this universe, I live in this universe because the universe has itself originated somewhere, someplace sometime. And the origin of the cosmos can be explained by physics. So, I am here due to physics. 

Just kidding! But this is the point. The point is that if we look backwards we will ultimately find that the master governance of everything lies in the laws of physics. And therefore, everything is physics.

The picture above sums up all.