The origin of the Big Bang and the fundamental question of why there is something rather than nothing are complex topics that have been the subject of philosophical and scientific inquiry. While there are ongoing debates and various theories, I can provide you with a brief overview of the current understanding within the scientific community:
Cause of the Big Bang: The exact cause or trigger of the Big Bang is still not fully understood. The Big Bang theory describes the expansion of the universe from an extremely hot and dense state, but it does not provide a definitive explanation for what caused the initial singularity. Some cosmologists speculate that the concept of "cause and effect" as we understand it may not be applicable to the origin of the universe, or that it may be a consequence of some deeper physical principles that are yet to be discovered.
Existence of something rather than nothing: The question of why there is something rather than nothing is a profound philosophical inquiry. It is important to note that the absence of a specific answer does not necessarily imply the existence of a God. From a scientific perspective, the nature of existence and the origin of the universe are subjects of ongoing investigation. The laws of physics and cosmological models attempt to explain the development and evolution of the universe, but they do not address the metaphysical question of why there is something rather than nothing.
It is important to approach these questions with an open mind, recognizing that our current understanding may be limited and subject to future revisions as scientific knowledge progresses.