Even though, for example, physics and sociology are distinct disciplines, the thesis of the unity of science says that in principle they must be part of a unified intellectual endeavor, science. The unity of science thesis is usually associated with the view of levels of organization in nature, where physics is the most basic, chemistry the level above physics, biology above chemistry, sociology above biology, and so forth. Further, cells, organisms, and cultures are all biological, but they represent three different levels of biological organization.

It has also been suggested (for example, by Jean Piaget, 1950) that the unity of science can be considered in terms of a circle of the sciences, where physics provides a basis for chemistry, chemistry for biology, biology for psychology, psychology for logic & mathematics and logic & mathematics for physics.

The thesis of a unity of science simply says that common scientific laws apply everywhere and on all levels of organization. On some levels of organization, the scientists there will call these laws by another name, or emphasize the importance of one over another. For example, thermodynamics or the laws of energy seem to be universal across a number of disciplines. That is almost certainly because nearly all systems in nature operate using transactions in energy. However, this does not . . . more

https://en.wikipedia.org/wiki/Unity_of_science