The idea that the universe is governed by the laws of physics arises from the observations and experimental evidence we have accumulated over centuries of scientific inquiry. These laws, such as the laws of gravity, electromagnetism, quantum mechanics, and relativity, describe and explain the behavior of matter, energy, and forces in our universe.
The reason the universe appears to be governed by these laws is still an open question in philosophy and science. One possible explanation is that the laws of physics are fundamental and inherent properties of the universe itself. In this view, the laws are not imposed externally but are rather inherent in the fabric of space and time.
Another perspective is that the laws of physics are emergent properties that arise from more fundamental principles or underlying structures. For example, the laws of thermodynamics can be derived from statistical mechanics, which describes the behavior of large ensembles of particles. Similarly, general relativity emerges from the concept of spacetime curvature in the presence of matter and energy.
It is also worth noting that the laws of physics are not fixed or immutable. They have evolved over time as our understanding of the universe has deepened. Scientific theories are refined and updated as new evidence and observations emerge. In this sense, our understanding of the laws of physics is a continual process of refinement and improvement.
As to the question of why the universe follows these laws, there are different philosophical perspectives. Some propose the anthropic principle, which suggests that the laws of physics must be compatible with the existence of intelligent observers. According to this principle, if the laws were significantly different, intelligent life as we know it would not be possible, and we wouldn't be here to ask the question.
Ultimately, the question of why the universe is governed by the laws of physics is still a subject of debate and exploration. It is an area of ongoing scientific research and philosophical inquiry, seeking to uncover the deep underlying principles that govern the behavior of our universe.